Networking

A technician is adding a wireless access point (AP) in an outbuilding connected via Ethernet to the main office network (192.168.1.0/24). After configuring the AP with a static IP of 192.168.1.250, clients can connect to Wi-Fi but cannot access the internet. The main office devices have no issues. What is the most likely cause?

A small office has a DHCP server that assigns IP addresses in the range 192.168.1.100 to 192.168.1.200. A file server needs a static IP address of 192.168.1.10. Which method should the technician use to ensure the server always receives that IP address without manually configuring the network adapter on the server?

A company has a router with four Ethernet ports. They need to connect 12 wired devices in the same LAN segment. All devices must receive IP addresses from the same DHCP server running on the router. Which device should the technician add?

A technician installs a new VoIP phone that receives power via PoE from a managed switch. The phone powers on but cannot register with the call server. A PC connected to the phone's passthrough port obtains an IP address and accesses the internet normally. Which of the following is the most likely cause of the phone's failure?

A network technician is troubleshooting a connectivity issue in a small office. A user's computer obtains an IP address starting with 169.254.x.x. The network uses DHCP from a router with IP 192.168.1.1. The technician checks the cable and sees the link light is on. The computer was working yesterday. Which of the following is the most likely cause?

A technician is replacing a 10/100 Mbps network switch with a new Gigabit switch. After connecting all devices, the technician notices that the link LEDs on several ports are showing amber instead of green. The switch documentation states that green indicates a 1000 Mbps link, and amber indicates a 10/100 Mbps link. All connected devices support Gigabit Ethernet. Which of the following is the MOST likely cause of this issue?

A user reports that their laptop can see the company's Wi-Fi SSID but cannot connect to the network. Other users in the same area can connect without issues. The technician verifies that the laptop's wireless adapter is enabled and that the wireless security key is correct. Which of the following should the technician check NEXT?

A technician is setting up a small network with a router, a 24-port unmanaged switch, and 15 computers. The router's DHCP server assigns IP addresses in the 192.168.1.0/24 range. All computers get valid IP addresses and can access the internet, but they cannot see each other in the network discovery list. Which of the following is the MOST likely cause?

An ISP provides a cable modem with a single Ethernet port. A technician needs to set up a small office network with 25 workstations that require internet access and must be on the same subnet. The technician has a 24-port unmanaged switch and a 48-port unmanaged switch. Which of the following is the MOST appropriate method to connect the devices?

A small office has a router that provides DHCP services. Several users report that they cannot access the internet, but they can still access shared folders on the local network. The technician checks one user's computer and sees an IP address of 169.254.10.25. Which of the following is the MOST likely cause of the issue?

A network technician is installing a new IP security camera that requires Power over Ethernet (PoE) IEEE 802.3af. The technician runs a new Cat6 Ethernet cable between a PoE switch port and the camera. The switch is PoE-enabled and configured to supply power. When the camera is connected, it does not power on. The technician tests the cable with a continuity tester, and all eight wires pass. Which of the following is the most likely cause of the issue?

A network administrator configures a new managed switch with 24 ports. All ports are in the same VLAN (VLAN 1) by default. The administrator then changes ports 1-12 to VLAN 10 and ports 13-24 to VLAN 20. Computers connected to ports in different VLANs are assigned IP addresses from the same DHCP server. Which of the following is a direct consequence of this configuration?

A technician is setting up a small office network with a router that has integrated DHCP and a 24-port unmanaged switch. All computers are connected to the switch. Users report that they can access the internet but cannot see each other in Network Neighborhood. The technician checks and finds that all computers have IP addresses in the 192.168.1.0/24 range but with different subnet masks: some have 255.255.255.0, others have 255.255.0.0. Which of the following is the most likely cause?

A technician is setting up a small office network with a wireless router serving as the DHCP server and an unmanaged 24-port switch. All desktop computers are connected to the switch via Ethernet cables. The computers can access the internet without any issues, but they cannot see each other in the network discovery list or ping each other by IP address. The technician checks the IP configuration on one computer and finds it has an IP address of 192.168.1.10 with a subnet mask of 255.255.255.0. The technician can ping the router (192.168.1.1). Which of the following is the MOST likely cause of this issue?

A user reports that their desktop computer can access shared files on the local network but cannot reach the internet. The technician checks the IP configuration and sees the address 169.254.25.100 with a subnet mask of 255.255.0.0. Other computers on the same subnet can access the internet normally. Which of the following is the MOST likely cause?

A technician sets up a small office network with a wireless router (with integrated DHCP) connected to an unmanaged 24-port switch. All desktop computers are connected to the switch via Ethernet cables. The computers can access the internet without issues, but they cannot ping each other by IP address. The technician checks one computer and sees an IP address of 192.168.1.10 with a subnet mask of 255.255.255.0, and can ping the router at 192.168.1.1. Which of the following is the MOST likely cause?

A user reports that they can access the internet by typing an IP address (e.g., 8.8.8.8) into their web browser, but they cannot access websites using domain names (e.g., www.example.com). Which of the following network services is MOST likely not functioning correctly?

A user reports that they can access internal network resources and the internet by IP address, but cannot browse websites using domain names. Other users on the same network can browse the internet normally. Which of the following should the technician do FIRST?

A network technician is troubleshooting a small office where several users cannot connect to the network. The DHCP server shows that the scope is 80% utilized. The technician checks the IP configuration of an affected computer and sees an IP address of 169.254.15.200 with a subnet mask of 255.255.0.0. Which of the following is the MOST likely cause of the issue?

A technician is troubleshooting a desktop computer that cannot access the internet. The computer is configured with a static IP address of 10.0.0.15, subnet mask 255.255.255.0, and default gateway 10.0.0.1. The technician can ping the default gateway successfully but cannot ping the public IP address 8.8.8.8. Other devices on the same network can access the internet normally. Which of the following is the MOST likely cause?

A user reports that they can access internal company web servers by IP address (e.g., http://10.0.1.50) but not by hostname (e.g., http://intranet). Other users on the same network can access the intranet by hostname without issue. The technician checks the computer's IP settings and sees that the DNS server address is manually set to 8.8.8.8. Which of the following is the MOST likely cause?

A network administrator recently installed a new firewall to replace an older router. After the installation, users can access the internet but cannot reach internal web servers by hostname (e.g., http://intranet). They can, however, access those servers by IP address. The administrator verifies that the DNS server is functioning and other traffic between the LAN and the internal server VLAN is allowed. What is the MOST likely cause of this issue?

A technician is troubleshooting a small office network where Windows computers can ping each other by IP address but cannot access shared folders using Universal Naming Convention (UNC) paths (e.g., \\COMPUTER1\Share). The computers are all in the same workgroup and subnet. The technician checks the network settings and sees that all computers have the correct default gateway and DNS server configured. Which of the following should the technician verify?

A small office has a network with a router providing DHCP, an unmanaged switch, and several workstations. A user can access the internet but cannot print to a network printer that has a static IP address of 192.168.1.100. The user's workstation has an IP of 192.168.1.50. The printer is powered on and its network cable is connected to the switch. Which of the following should the technician do FIRST to troubleshoot the issue?

A network technician is configuring a managed switch for a small office. The security requirement is that only specific authorized devices should be allowed to connect to the network via the switch ports. The technician wants to automatically learn the MAC addresses of devices as they connect and lock them to the port to prevent unauthorized devices from using the same port. Which switch feature should be configured to accomplish this?

A small office wants to provide guest Wi-Fi access without allowing guests to access the internal company network. Which of the following is the BEST way to isolate guest traffic?

A small office has a network with a router providing DHCP. A user's computer can access the internet but cannot print to a network printer by its IP address. Other computers on the same network can print to the printer. The technician pings the printer's IP from the affected computer and gets a response. Which of the following should the technician check NEXT?

A user reports that they can access the internet and browse websites normally, but they cannot access a shared network drive that is mapped to a static IP address (\\10.10.10.50\shared). The technician can successfully ping 10.10.10.50 from the user's computer. Which of the following should the technician check NEXT?

A network administrator sets up a new file server with a static IP address of 192.168.1.100. The server is connected to the company's main switch. For the first few hours, all clients can reach the server without issues. The next day, clients report they cannot connect to the server. The administrator finds that the server's IP address has been reassigned to a different device. The DHCP server is configured with a scope from 192.168.1.50 to 192.168.1.150. Which of the following is the BEST permanent solution to prevent this issue?

A network technician is configuring a managed switch for a small office. The security policy requires that only specific authorized devices should be allowed to connect to the network via the switch ports. The technician wants the switch to automatically learn the MAC addresses of the first device that connects to each port and then lock that port to only that MAC address. Any other device connecting to the same port should be blocked. Which switch feature should be configured to accomplish this?

A network administrator configures a small office with a router providing DHCP. A user's computer gets an IP address of 169.254.1.5. The user cannot access the internet. The technician checks the network cable and sees link lights. Which of the following is the MOST likely cause?

A network administrator configures a router with VLANs. Devices on VLAN 10 can successfully ping a web server (IP 192.168.20.10) on VLAN 20. However, when users on VLAN 10 attempt to access the web server via a browser using its IP address, the connection times out. The router's ACLs permit ICMP and TCP/80 traffic between VLANs. Which of the following should the administrator check NEXT?

A user reports that they can browse the internet and access all network resources by IP address, but they cannot print to the network printer by its hostname. Other users can print using the hostname without issue. The technician pings the printer's IP address from the affected computer and gets a successful reply. Which of the following should the technician check next?

A network technician is configuring a router for a small office. The office has two subnets: 192.168.1.0/24 for staff and 192.168.2.0/24 for guests. Staff can access the internet, but guests cannot. The technician confirms that both subnets have a default route to the router's WAN IP. The router has an ACL applied to the guest VLAN interface that denies all traffic to the WAN interface. What should the technician change to allow guests internet access?

A user can access the internet and browse websites normally, but when they try to access a shared network drive by its hostname (\\fileserver\share) the connection fails. Other users on the same network can access the drive using the hostname without issue. The technician can successfully ping the fileserver's IP address from the affected computer. Which of the following should the technician check NEXT?

A user in a small office reports that their computer cannot access the internet. The technician runs ipconfig and sees the IP address is 169.254.15.22. The technician checks the network cable and sees link lights on the NIC and the wall jack. Which of the following is the MOST likely cause of this issue?

A network technician is troubleshooting a connectivity issue. Users on VLAN 10 (192.168.10.0/24) can access the internet but cannot reach a server on VLAN 20 (192.168.20.0/24) by IP address. The router's ACL allows all traffic between VLANs. The technician pings the server IP from a client on VLAN 10 and gets a request timed out. The technician then checks the routing table on the router and sees routes for both VLANs. Which of the following is the NEXT step to isolate the issue?

A user reports that they can ping the IP address 8.8.8.8 successfully from their computer, but they cannot browse the internet using website names. Other users on the same network have no issues. Which of the following should the technician check FIRST?

A small office uses a router with DHCP service. One user reports that their computer can obtain an IP address in the 192.168.1.0/24 range, but cannot ping the default gateway (192.168.1.1). Other computers on the same network can ping the gateway and access the internet. The technician verifies the network cable shows link lights and the IP address is valid. Which of the following should the technician check NEXT?

A user reports that their computer's internet speed is much slower than expected. A speed test shows 10 Mbps, but the ISP plan provides 100 Mbps. The technician tests a laptop directly connected to the ISP modem and gets 100 Mbps. The user's computer is connected to the network via a wall jack and patch panel. The technician checks the computer's NIC and sees it is negotiating at 10 Mbps. Which of the following is the MOST likely cause?

A network technician is troubleshooting inter-VLAN routing. Clients on VLAN 10 (192.168.10.0/24) cannot communicate with servers on VLAN 20 (192.168.20.0/24). The router has subinterfaces for both VLANs and is connected to a layer 2 switch. The switch port connecting to the router is configured as an access port in VLAN 10. An ACL on the router is configured to permit all traffic between the VLANs. Which of the following is the MOST likely cause of the issue?

A technician is troubleshooting inter-subnet connectivity. The network consists of a router with two interfaces: 192.168.1.1/24 for Subnet A and 192.168.2.1/24 for Subnet B. A device on Subnet A (192.168.1.10/24) can ping the router's Subnet A interface (192.168.1.1) and other devices on Subnet A, but cannot ping a device on Subnet B (192.168.2.10/24). The device on Subnet B can ping its gateway (192.168.2.1) and other Subnet B devices. The router has IP routing enabled and no ACLs are configured. Which of the following is the MOST likely cause of the issue?

A user reports that they cannot access the company's external website at www.company.com from their workstation. Other users on the same network can access the website without issues. The technician runs nslookup www.company.com and receives the correct public IP address. The technician then pings that IP address and gets a successful reply. Which of the following is the MOST likely cause of the issue?

A user reports that they can access the company's internal web server by IP address (192.168.2.10) but not by its hostname (intranet.company.local). Other users on the same network can access the server by hostname without issues. The technician checks the user's network settings and sees that the DNS server is correctly set to the company's internal DNS server. Which of the following should the technician check NEXT?

A user reports that they can access internal company servers by IP address but cannot access the internet. The user can ping the default gateway successfully. Other users on the same subnet have full internet access. The technician checks the user's IP configuration and sees that the IP address, subnet mask, and default gateway are correct. The DNS server address is set to the company's internal DNS server (10.0.1.10). Which of the following is the MOST likely cause of the issue?

A small office uses a single router that provides DHCP services for the LAN. The router is connected to a switch, and all workstations are connected to the switch. Two workstations (Workstation A and Workstation B) are unable to obtain an IP address from DHCP. They both receive APIPA addresses. Other workstations on the same switch obtain IP addresses and can access the internet. The technician checks the router's DHCP server logs and sees that the pool is not exhausted. Which of the following is the MOST likely cause of the issue?

A technician is setting up a small office network. The company has a single public IP address from the ISP. The technician needs to configure the router so that multiple internal devices can share that IP address to access the internet. Which of the following settings should the technician configure?

A technician is setting up a small office network. The ISP provides a modem with a single Ethernet port. The office has 10 computers that all need to share the single public IP address to access the internet. Which of the following devices should the technician connect directly to the modem to allow all computers to access the internet?

A user reports that they can access internal company servers using IP addresses (e.g., 192.168.1.100) but cannot browse the internet. The user can ping the default gateway (192.168.1.1) successfully. Other users on the same subnet have full internet access. The technician checks the user's IP configuration and sees that the IP address, subnet mask, default gateway, and DNS server (192.168.1.10) are all correct. Which of the following is the MOST likely cause of the issue?

A small office uses a single router that provides DHCP services for the LAN. The router is connected to a managed switch, and 20 workstations are connected to the switch. Two workstations (Workstation A and Workstation B) are unable to obtain an IP address from DHCP. They both receive APIPA addresses (169.254.x.x). Other workstations on the same switch obtain IP addresses and can access the internet. The technician checks the router's DHCP server logs and sees that the pool of available addresses is not exhausted. Which of the following is the MOST likely cause of the issue?

A user reports that they can access internal company servers by IP address and hostname, but cannot browse the internet. The user can ping the default gateway (192.168.1.1) successfully. Other users on the same subnet have full internet access. The technician checks the user's IP configuration and sees that the IP address, subnet mask, default gateway, and DNS server (192.168.1.10) are all correct. Which of the following should the technician check NEXT?

A technician is troubleshooting a user's computer that can successfully ping internal servers by IP address and hostname, but cannot access any external websites or services on the internet. The user can ping the default gateway (192.168.1.1). Other users on the same subnet have normal internet access. The technician has verified that the IP address, subnet mask, default gateway, and DNS server settings are correct on the user's computer. Which TWO of the following are the MOST likely causes of this issue? (Choose two.)

A technician is setting up a small office network. The ISP provides a modem with a single Ethernet port and a single public IP address. The office has eight computers that all need to access the internet simultaneously. Which of the following devices should the technician connect directly to the modem to allow all computers to share the internet connection?

A user reports that they cannot access the internet, but they can access internal network resources by IP address. The technician runs ipconfig and sees IP address 192.168.1.12, subnet mask 255.255.255.0, default gateway 192.168.1.1, DNS server 192.168.1.1. The user can ping 192.168.1.1 and 8.8.8.8 successfully. However, they cannot ping www.google.com. Which of the following is the MOST likely cause?

A user reports that after a power outage and router restart, their desktop computer can no longer access network shares on other computers. The user can access the internet. The technician runs ipconfig and sees the IP address changed from 192.168.1.50 to 192.168.1.75. The other computers on the network have static IP addresses. Which of the following should the technician configure to resolve the issue permanently?

A technician is setting up a small office network. The router has only four LAN ports, but the office has six computers and two network printers that all need to be connected to the same network. Which additional device should the technician use to connect all devices?

A small business owner wants to allow remote employees to access a file server on the company's internal network from the internet. The company has a single public IP address provided by the ISP and a router that performs NAT. The file server has a static private IP address of 192.168.1.100. Which of the following router configuration settings should the technician use to enable this access?

A technician is setting up a small office network. The ISP provides a cable modem with a single Ethernet port. The office has 15 computers that all need internet access. The technician has a router with four LAN ports and a 24-port unmanaged switch. Which of the following is the correct way to connect the devices to provide internet access to all computers?

A technician configures a new managed switch in a small network. After connecting the switch to the existing switch via a single Ethernet cable, the link LED on the uplink port is solid amber. Devices on the new switch cannot communicate with devices on the existing network. The existing network has no loops and uses a single switch. Which of the following is the MOST likely cause?

A user reports that they can access the internet and browse other websites normally, but when they try to visit https://www.example.com, the browser displays 'This site can't be reached'. Other computers on the same network can access the website. The technician has confirmed that the computer can ping the IP address of the website's server (93.184.216.34) successfully. The DNS settings appear correct. Which of the following should the technician check FIRST?

A small office network consists of 12 workstations and a single router. The administrator wants each workstation to obtain an IP address, subnet mask, and default gateway automatically without manual configuration. Which protocol must be enabled on the router to provide this functionality?

A technician is installing a PoE security camera that is located 85 meters (279 feet) from the network switch. The switch does not support Power over Ethernet (PoE). The camera requires both data connectivity and power over the same Ethernet cable. Which of the following is the best solution?

A small office has 15 workstations connected to a single unmanaged switch, which is connected to a router that provides internet access. Users report that the network is slow. A technician notices that the activity lights on the switch are blinking rapidly and almost constantly, even during off-peak hours. Which of the following is the most likely cause?

A user in a small office can access shared files on the local network and can connect to the internet using a web browser when entering IP addresses directly (e.g., http://198.51.100.1) but cannot access any websites by their domain names (e.g., www.example.com). The network uses a DHCP server. Which of the following is the most likely cause of this issue?

A small business has a single router with four built-in LAN ports. They need to connect 12 workstations to the network. The technician adds a 24-port unmanaged switch and connects it to one of the router's LAN ports. After connecting all workstations, some users report intermittent network connectivity. The technician checks the switch and notices the collision LED is flashing rapidly. Which of the following is the MOST likely cause of the issue?

A user in a small office reports that their laptop cannot connect to the corporate Wi-Fi network. Other devices in the same area connect without issue. The laptop can connect to the internet when plugged into the wired Ethernet port. The technician checks the wireless adapter status and sees it is enabled and shows available networks, but the corporate SSID is not listed. Which of the following is the most likely cause?

A user's workstation is unable to access the internet. The technician runs ipconfig and sees an IP address of 169.254.1.15 with a subnet mask of 255.255.0.0. What is the most likely cause?

A technician is installing a new wireless router in a small office. The router is connected to a cable modem that has a solid online light. All wireless clients can connect to the router’s Wi-Fi network, but they cannot access the internet. Which of the following should the technician check NEXT?

A small business currently has a single router that provides internet access and DHCP services. The owner wants to add a second wireless router to extend Wi-Fi coverage to a far part of the building. The technician connects the WAN port of the new router to a LAN port on the existing router using a patch cable. Wireless clients can connect to the new router's SSID and obtain IP addresses, but they cannot access the internet or any resources on the main LAN. Which of the following is the most likely cause?

A small office has 10 workstations connected to a single unmanaged switch, which is connected to a router that provides internet access. All workstations can access the internet. The manager wants to add a network printer so all workstations can print. The printer has an Ethernet port. Which of the following is the easiest way to connect the printer to the network?

A technician is setting up a small network for a home office. The ISP modem provides a public IP address via DHCP. The technician connects a wireless router's WAN port to the modem and configures the router to use DHCP on the WAN interface. The router's LAN network is 192.168.1.0/24. A user connects a laptop via Ethernet to one of the router's LAN ports and can access the internet. However, the user's network printer, which has a static IP address, was previously connected directly to the modem and now cannot be reached from the laptop. The printer is powered on and its Ethernet link light is on. Which of the following is the most likely cause?

A small office uses a single DHCP server to assign IP addresses. Recently, several users have reported that their laptops cannot connect to the wired network. The technician runs ipconfig on one of the affected laptops and sees an IP address of 169.254.13.45 with a subnet mask of 255.255.0.0. The DHCP server shows that the scope has only 5 available addresses out of 100. Which of the following is the most likely cause of the problem?

A small office network uses a router (192.168.1.1/24) and an unmanaged switch. A technician configures a server with a static IP address 192.168.1.100/24, gateway 192.168.1.1, and connects it to the switch. Workstations on the same subnet can ping the router (192.168.1.1) but cannot ping the server. The server can ping its own IP and the router. Which of the following is the MOST likely cause?

A small office network uses a router with DHCP enabled on the 192.168.1.0/24 subnet. A technician configures a file server with a static IP address of 192.168.1.150, subnet mask 255.255.255.0, and default gateway 192.168.1.1. Workstations on the same subnet can ping the router (192.168.1.1) but cannot ping the server. The server can ping its own IP and the router. Which of the following is the MOST likely cause?

A technician is setting up a small office network. The router is connected to the ISP modem and has a public IP address on its WAN interface. The router's LAN is configured with DHCP on the 192.168.1.0/24 subnet. A workstation obtains an IP address of 192.168.1.10, subnet mask 255.255.255.0, and default gateway 192.168.1.1 from the router. The workstation can ping the gateway and other workstations on the same subnet, but it cannot access websites by IP address or domain name. Which of the following is the most likely cause?

A small office uses a single router with DHCP enabled (192.168.1.0/24). A technician configures a network printer with a static IP address of 192.168.1.150, subnet mask 255.255.255.0, default gateway 192.168.1.1, and DNS server 8.8.8.8. The printer is connected to the same switch as the workstations. Workstations can ping the router but cannot ping the printer. The printer can ping its own IP and the router. Which of the following is the MOST likely cause?

A small office network uses a router with DHCP enabled (192.168.1.0/24). A technician configures a network printer with a static IP address of 192.168.1.150, subnet mask 255.255.255.0, default gateway 192.168.1.1. Workstations on the same subnet can ping the router (192.168.1.1) and other workstations, but cannot ping the printer. The printer can ping its own IP and the router. Which of the following is the MOST likely cause?

A technician is configuring a small office network with a managed switch. The network has two VLANs: VLAN 10 for workstations (192.168.10.0/24) and VLAN 20 for servers (192.168.20.0/24). The switch ports for workstations are set to access mode and assigned to VLAN 10. The server ports are also set to access mode and assigned to VLAN 20. The router is connected to one of the switch ports and is configured with subinterfaces (192.168.10.1 on VLAN 10 and 192.168.20.1 on VLAN 20) to route between VLANs. A workstation on VLAN 10 cannot ping a server on VLAN 20. The workstation can ping other workstations on VLAN 10. The technician has verified the router subinterfaces are configured correctly. Which of the following is the MOST likely cause of the problem?

A user reports that their workstation cannot access network resources. The technician runs ipconfig and sees the following: IP address: 192.168.1.100, Subnet mask: 255.255.255.0, Default gateway: 192.168.1.1. The technician pings 127.0.0.1 (success), pings 192.168.1.100 (success), but pinging 192.168.1.1 fails. Other workstations on the same subnet can ping the default gateway successfully. The cable is connected and the link light is on. Which of the following is the MOST likely cause?

A technician is setting up a small office network. The router is configured with DHCP and provides addresses in the 192.168.1.0/24 range. A workstation obtains an IP address of 192.168.1.15 but cannot access any external websites. The workstation can ping the default gateway (192.168.1.1) and other local workstations. Which of the following is the most likely cause?

A technician is troubleshooting a workstation that is connected to a managed switch. The link lights on both the workstation and switch are illuminated, but the workstation cannot obtain an IP address from the DHCP server. The technician manually configures a static IP address (192.168.1.100, subnet mask 255.255.255.0, default gateway 192.168.1.1) on the workstation, but it still cannot ping the router (192.168.1.1). Other workstations on the same switch can ping the router successfully. Which of the following is the MOST likely cause of this issue?

A technician sets up a small office network. The router is configured with DHCP providing addresses in the 192.168.1.0/24 range. A new employee's laptop obtains an IP address of 192.168.1.50, subnet mask 255.255.255.0, and default gateway 192.168.1.1. The laptop can ping other local workstations and the router (192.168.1.1), but cannot access any external websites by domain name or IP address. Which of the following is the MOST likely cause of this issue?

A technician connects a new workstation to a wall jack in an office. The link lights on both the workstation's NIC and the switch port are solid green. The workstation cannot obtain an IP address via DHCP. The technician manually assigns a static IP address in the same subnet as other working workstations (192.168.1.100/24, gateway 192.168.1.1), but the workstation still cannot ping the gateway or any other device on the network. Other workstations connected to the same switch can access network resources normally. Which of the following is the MOST likely cause of this issue?

A company uses a managed PoE switch to power IP phones. A new IP phone is connected to a wall jack that is patched to the switch. The switch port shows 'not powered' in the management interface, even though PoE is enabled globally and the phone is known to work. Which of the following is the MOST likely cause?

A small office network uses a managed switch with port security enabled. A new employee connects their laptop to a configured port, but the laptop cannot obtain an IP address or communicate on the network. The link light on the switch port is on. Other ports in the same VLAN work correctly. Which of the following is the MOST likely cause?

A technician is configuring a new VLAN for the accounting department on a managed switch. The switch is connected to a router-on-a-stick configuration for inter-VLAN routing. The technician creates VLAN 30 (Accounting) on the switch, assigns ports 6-10 to access mode in VLAN 30, and configures the switch's trunk port to the router to allow VLAN 30. The router's subinterface for VLAN 30 is configured with IP address 192.168.30.1/24. A workstation on port 6 (static IP 192.168.30.10/24) cannot communicate with a server on VLAN 20 (192.168.20.50/24) that it could reach previously when both were on the same VLAN. Other workstations in VLAN 30 can ping the router's subinterface (192.168.30.1). Which of the following is the MOST likely cause of the issue?

A workstation is connected to a managed switch. It obtains a valid IP address (192.168.10.50) from the DHCP server, but it cannot ping the default gateway (192.168.10.1). The link light on both the workstation NIC and the switch port are solid green. Other workstations on the same switch CAN ping the default gateway successfully. The technician accesses the switch management interface and finds that the workstation's port is configured as an access port on VLAN 10. The default gateway is located on VLAN 20. An inter-VLAN router is configured but not explicitly allowing VLAN 10 access to VLAN 20. Which of the following is the MOST likely cause of the problem?

A technician configured a workstation with a static IP address of 192.168.1.100, subnet mask 255.255.255.0, default gateway 192.168.1.1, and DNS server 8.8.8.8. The workstation can successfully ping the default gateway and other local devices on the same subnet. However, the user cannot browse any websites. The technician verifies that the internet connection is working from other devices on the network. Which of the following is the MOST likely reason the workstation cannot access websites?

A small office uses a DHCP server to assign IP configurations. A new laptop obtains an IP address of 192.168.1.50/24, default gateway 192.168.1.1, and DNS server 10.0.0.1. The laptop can ping the gateway and other local devices, but cannot resolve any domain names. Other devices on the network, which have the DNS server 192.168.1.10 configured, can access the internet without issues. Which of the following is the MOST likely cause?

A user reports that their desktop computer loses network connectivity every few minutes, especially when the nearby overhead fluorescent lights are turned on. The technician observes that the link light on the NIC occasionally turns off during these events. The Ethernet cable is a Cat5e unshielded twisted pair (UTP) cable routed through the ceiling near the light fixtures. Which of the following is the MOST likely cause of the intermittent connectivity?

A small office network has two managed switches, Switch A and Switch B, connected via a trunk link. Switch A has VLAN 10 (192.168.10.0/24) and VLAN 20 (192.168.20.0/24) configured. Switch B has only VLAN 10 configured. A router-on-a-stick is connected to Switch A and performs inter-VLAN routing. A workstation connected to an access port on Switch B in VLAN 10 can ping other devices in VLAN 10 on both switches, but it cannot ping a server in VLAN 20 that is connected to Switch A. The trunk port on Switch B is configured to allow all VLANs. Which of the following is the MOST likely cause of this issue?

A small office network uses a single managed switch connected to a router. A workstation is configured with a static IP address of 10.0.0.50/24, default gateway 10.0.0.1, and DNS server 10.0.0.10. The workstation can successfully ping other workstations on the same local subnet, but it cannot ping the default gateway (10.0.0.1) or access the internet. The technician checks the router and finds that the router's interface connected to the switch has IP address 10.0.0.1/24. The switch port connecting the router is configured as an access port on VLAN 1. The workstation's switch port is configured as an access port on VLAN 10. Other workstations on VLAN 10 have the same issue. Which of the following is the MOST likely cause?

A user installs a new third-party security software suite on their Windows workstation. After installation, the user can still access files on the local network and can ping external IP addresses like 8.8.8.8, but cannot browse any websites using a web browser. Other workstations on the same network are unaffected. Which of the following is the MOST likely cause?

A small office network consists of a router (192.168.1.1/24) connected to a managed switch. The switch has all ports configured as access ports on VLAN 1. A workstation obtains an IP address of 192.168.1.50/24 from the DHCP server running on the router. The workstation can successfully ping other workstations in the same subnet but cannot ping the default gateway (192.168.1.1). The router's LAN interface is configured with IP address 10.0.0.1/24. Which of the following is the MOST likely cause?

A technician is configuring a small office network with a managed switch and a router that supports inter-VLAN routing. A workstation on VLAN 10 (192.168.10.0/24) can ping other workstations on VLAN 10 but cannot ping a server on VLAN 20 (192.168.20.0/24). The switch has a trunk port connecting to the router, and the trunk is configured to allow VLANs 10 and 20. The workstation's default gateway is set to 192.168.10.1. The server's default gateway is set to 192.168.20.1. Which of the following is the MOST likely cause of the problem?

A technician configures a new workstation with DHCP. Initially, the workstation obtains an IP address of 192.168.1.100/24 with default gateway 192.168.1.1 and can browse the internet. After approximately 30 minutes, the user reports that internet access stops working, but the workstation can still ping other local devices on the same subnet. The technician runs ipconfig and sees that the workstation now has an IP address of 169.254.15.78. Which of the following is the MOST likely cause?

Employees in a small office report that their wired network connections become extremely slow or drop every time the office microwave oven is used. The microwave is located in the breakroom, and the network cables for the cubicles run through the ceiling directly above the breakroom. The cables currently installed are unshielded twisted pair (UTP) Cat5e. The technician has confirmed the microwave is not physically damaging the cables and that the router and switch are not overheating. Which of the following solutions would MOST effectively resolve the intermittent network issues?

A user configures a workstation with a static IP address of 192.168.1.50, subnet mask 255.0.0.0, default gateway 192.168.1.1, and DNS server 8.8.8.8. The workstation can ping other computers on the local network (e.g., 192.168.1.100) but cannot ping the default gateway (192.168.1.1) or access the internet. Other workstations using DHCP on the same network have no issues. Which of the following is the MOST likely cause?

A small office network uses a single router configured as a DHCP server for the 192.168.1.0/24 network. The DHCP scope is set to 192.168.1.10 - 192.168.1.50. Over the past week, several workstations have reported intermittent connectivity. The technician checks a workstation and finds that its IP address has changed from 192.168.1.20 to 169.254.15.100. Other workstations also show similar APIPA addresses. The DHCP server logs indicate that many lease requests are being declined. The network has 45 devices that require IP addresses. Which of the following is the MOST likely cause of the issue?

A technician replaced an unmanaged network switch with a new managed switch in a small office. After reconnecting all devices, some workstations can access the internet, but others cannot. The workstations that cannot access the internet are physically connected to the switch and their link lights are on. The technician checks the switch configuration and finds that all ports are set to 'trunk' mode by default. The router is connected to port 1, which is also set to trunk mode. Which of the following is the MOST likely cause?

A technician configures a new workstation with a static IP address of 10.0.0.5, subnet mask 255.255.255.0, default gateway 10.0.0.1, and DNS server 8.8.8.8. The workstation can ping the gateway (10.0.0.1) but cannot ping any external IP addresses like 8.8.8.8 or access the internet. Other workstations on the same network using DHCP are working fine. The router's WAN connection is working. Which of the following is the MOST likely cause?

A user can access local network resources but cannot browse the internet. Other users on the same network have no issues. The technician checks the workstation's IP configuration: IP 192.168.1.100, subnet mask 255.255.255.0, default gateway 192.168.1.1, DNS server 192.168.1.1. The workstation successfully pings the default gateway (192.168.1.1). The technician then tries to ping 8.8.8.8 and the ping fails. Which of the following should the technician check NEXT?

A user reports that they cannot access the internet, but they can still access shared folders on the local network. The technician runs ipconfig on the workstation and sees an IP address of 169.254.10.15 with a subnet mask of 255.255.0.0. Which of the following is the MOST likely cause of this issue?

A user reports that they cannot access any websites using their web browser, but they can successfully ping external IP addresses such as 8.8.8.8. Other users on the same network are able to browse the internet normally. The technician checks the workstation's IP configuration and finds the following: IP 192.168.1.50, subnet mask 255.255.255.0, default gateway 192.168.1.1, DNS server 192.168.1.1. The technician can ping 192.168.1.1 successfully. Which of the following is the MOST likely cause?

A company replaces an unmanaged network switch with a new managed switch in a small office. After reconnecting all devices, some workstations can access the internet, but others cannot. The workstations that cannot access the internet are all connected to ports 1-8 of the new switch, while workstations on ports 9-16 work normally. The router is connected to port 24. The technician checks the switch configuration and finds that all ports are in the default VLAN 1, but ports 1-8 have been accidentally reassigned to VLAN 2. Which of the following is the MOST likely reason the workstations on ports 1-8 cannot access the internet?

A small office uses a single router as the DHCP server for the 192.168.1.0/24 network. The DHCP scope is configured to issue addresses from 192.168.1.100 to 192.168.1.200. A new employee connects a laptop to an available wall jack and receives an IP address of 169.254.13.57. Other devices in the office are receiving valid IP addresses in the 192.168.1.x range. The technician checks the wall jack and the switch port, and the link light is solid green. Which of the following is the MOST likely cause of this issue?

A technician is troubleshooting a workstation that can access local network resources and can successfully ping external IP addresses like 8.8.8.8, but cannot browse any websites using a web browser. Other workstations on the same network are able to browse the internet normally. The workstation's IP configuration is static: IP 192.168.1.50, subnet mask 255.255.255.0, default gateway 192.168.1.1, DNS server 192.168.1.1. Which of the following is the MOST likely cause of this issue?

A user's workstation is connected to a network switch. The workstation can access the internet and other network resources, but network transfers are extremely slow. The technician runs a speed test and gets 10 Mbps download, but the internet plan is 500 Mbps. The technician checks the switch port and sees the link light is green but blinking slowly. The technician connects a laptop to the same cable and gets 500 Mbps. Which of the following is the MOST likely cause?

A network technician is tasked with providing secure remote access for employees who work from home. The solution must encrypt all traffic between the remote devices and the corporate network and must allow the remote devices to access internal resources (e.g., file servers, intranet) as if they were directly connected to the office LAN. Which of the following technologies should the technician implement?

A support technician is troubleshooting a user's workstation that can successfully ping the loopback address (127.0.0.1) and the default gateway (192.168.1.1), but cannot access any internet websites. The user's web browser displays 'This site cannot be reached' for all URLs. Other devices on the same network can browse the internet without issue. The technician runs ipconfig and finds: IP 192.168.1.50, subnet mask 255.255.255.0, default gateway 192.168.1.1, DNS server 192.168.1.1. The technician can successfully ping 8.8.8.8 from the affected workstation. Which of the following is MOST likely the cause?

A user reports that their desktop computer is experiencing very slow network performance. The technician runs a speed test and gets only 10 Mbps download speed, while other devices on the same network achieve 500 Mbps. The technician checks the network adapter settings in the operating system and sees that 'Speed & Duplex' is manually set to '10 Mbps Half Duplex'. Which of the following should the technician do to resolve this issue?

A user reports that their workstation can access the internet and other network resources by IP address, but cannot connect to an internal file server (fileserver.company.local) by its hostname. Other users on the same network can access the file server by hostname without issue. The workstation's IP configuration is static: IP 192.168.1.10, subnet mask 255.255.255.0, default gateway 192.168.1.1, and DNS server 192.168.1.1. The technician pings the IP address of the file server (192.168.1.100) successfully from the affected workstation. Which of the following is the MOST likely cause of the issue?

A user is unable to print to a network printer. Other users on the same network can print to it successfully. The technician checks the user's workstation and confirms it has a valid IP address on the correct subnet. The printer's network cable is plugged in, and the link lights are active. Which of the following should the technician check FIRST?

A workstation with a static IP address of 192.168.1.10/24 can ping its default gateway (192.168.1.1) and other workstations on the same subnet. However, it cannot ping any device on a different subnet (e.g., 10.0.0.1) nor access the internet. Other workstations on the same subnet can ping the same remote device and access the internet without issue. The technician has verified the workstation's IP configuration is correct. Which of the following is the MOST likely cause?

A user reports that their workstation intermittently loses network connectivity. The technician checks the IP configuration during an outage and finds the IP address is 169.254.12.34. The network uses DHCP, and other workstations on the same subnet are functioning normally. Which of the following is the MOST likely cause of the issue?

A user reports that their workstation can access internal network resources by IP address (e.g., \\192.168.1.100\share) and can browse the internet using IP addresses (e.g., http://8.8.8.8), but cannot access any resources by hostname (e.g., \\fileserver\share or www.example.com). Other workstations on the same subnet can resolve hostnames without issue. The workstation obtains its IP address via DHCP. The technician runs ipconfig and sees: IP: 192.168.1.105, Subnet Mask: 255.255.255.0, Default Gateway: 192.168.1.1, DNS Server: 192.168.1.1. Which of the following is the MOST likely cause of this issue?

A network technician is connecting two network switches in a small office to extend the wired network. The technician uses two cables between the switches for redundancy, but the network becomes unstable and devices experience intermittent connectivity. Which of the following protocols should the technician implement to prevent network loops while allowing the redundant links?

A technician is troubleshooting a user's workstation that has intermittent network connectivity. The technician observes that the Ethernet link light on the workstation's NIC flashes irregularly and occasionally stays off for a few seconds. The cable passes a wiremap test. The switch port is configured for auto-negotiation. Which of the following is the MOST likely cause?

A user connects a laptop to a hotel's wired Ethernet port. The laptop obtains an IP address of 169.254.15.32 and cannot access the internet. Other guests' laptops on the same hotel network work without issue. The technician has verified that the laptop's network adapter is enabled, the driver is up to date, and that the Ethernet cable is securely connected. Which of the following is the MOST likely cause of the issue?

A user reports that their laptop can see the corporate Wi-Fi network (SSID: CorpNet) and has a strong signal, but cannot connect. Other users on the same network are connecting successfully. The technician checks the laptop's wireless configuration and finds that it is set to obtain an IP address automatically. However, the security settings are set to 'Open'. Which of the following is the MOST likely reason the laptop cannot connect?

A network technician is setting up a small office with 15 workstations. The ISP provides a single public IPv4 address. The technician configures the router to assign private IP addresses (192.168.1.x) to the workstations via DHCP. Which technology allows all 15 workstations to share the single public IP address to access the internet?

A technician is terminating an Ethernet cable for a 1000BASE-T network. The technician uses the T568A standard on one end and T568B on the other. Which of the following describes the resulting cable type?

A user in a densely populated apartment building complains of frequent Wi-Fi disconnects and slow speeds on the 2.4 GHz band. A spectrum analysis shows many overlapping networks on channels 1, 6, and 11. The router supports both 2.4 GHz and 5 GHz. Which of the following is the BEST solution to improve the user's wireless experience?

A technician is setting up a small office network with 20 computers. The ISP provides a modem that only has one Ethernet port. The technician needs to connect all computers to the internet and allow them to communicate with each other. Which device should the technician use to connect the computers to the modem?

A small office has 12 computers connected to a single unmanaged switch, which is connected to a router providing internet access. Users report that at random times, all computers lose internet connectivity for a few seconds, then it returns. The technician observes that when the problem occurs, the lights on the switch do not change, but a Ping to the router fails. The technician has replaced the router and the switch, but the issue persists. Which of the following is the MOST likely cause?

A small office network consists of a router and an unmanaged switch. Every day at 2:00 PM, users report extremely slow network performance and intermittent connectivity that lasts about 30 minutes. A technician checks the switch's interface statistics and notices a high number of CRC errors on the port connected to a VoIP phone. The cable connecting the phone to the wall jack is a known working Cat5e cable. Which of the following is the MOST likely cause of the issue?

A small office has 18 computers that need to be connected to share files and access the internet. The ISP provides a modem with a single Ethernet port. The office router has four LAN ports. Which device should the technician add to enable all 18 computers to connect to the network?

A small office network consists of a router (with built-in DHCP server) and an unmanaged switch. All 12 workstations are connected to the switch, and they have internet access. However, users cannot see each other's shared folders over the network. The technician has verified that all workstations are on the same IP subnet (192.168.1.0/24) and can ping each other successfully. Which of the following is the MOST likely cause of this issue?

A user reports that their laptop can connect to the office Wi-Fi but cannot access any websites. The technician successfully pings the default gateway (192.168.1.1) from the laptop. The technician also logs into the router and successfully pings 8.8.8.8. Which of the following is the MOST likely cause of the issue?

A technician is troubleshooting a user's workstation that can ping other computers on the local network but cannot access any websites. The user's router is configured with DHCP and DNS is set to automatic. The technician runs ipconfig /all and sees the workstation has an IP address of 192.168.1.45 with a subnet mask of 255.255.255.0 and a default gateway of 192.168.1.1. The technician successfully pings 8.8.8.8 from the workstation. Which of the following is the MOST likely cause of the issue?

A small office has a router serving as the DHCP and DNS server. All workstations can access the internet but cannot connect to a local file server using its hostname (\\fileserver). They can successfully ping the file server's IP address (192.168.1.10). The technician has verified that the file server is powered on and sharing folders. Which of the following is the MOST likely cause of the issue?

A small office has 15 desktop computers connected to a single managed switch. The switch is connected to a router that provides DHCP and DNS services. Users report that they can access the internet but cannot communicate with each other using computer names (e.g., \\PC1). The technician verifies that all workstations are on the same subnet (192.168.1.0/24) and can successfully ping each other's IP addresses. Which of the following is the MOST likely cause of the issue?

A user at a small office reports that they can access the internet but cannot connect to the company's internal file server using its hostname (\\fileserver). The user can ping the file server's IP address successfully. The technician checks the workstation's network settings and sees that it is obtaining an IP address from DHCP and the default gateway is correct. The DNS server address is set to the company's internal DNS server (192.168.1.5). Other workstations on the same network can access the file server by hostname without issue. Which of the following is the MOST likely cause of the problem?

A network administrator is setting up a wired network for a small office that has 25 workstations, 2 file servers, and a router with 4 LAN ports. The office uses IP-based printers and VoIP phones. The administrator wants to minimize broadcast traffic and improve network performance by separating the workstations from the servers and printers. Which of the following is the BEST solution?

A user moves their laptop from a conference room to their office and connects the Ethernet cable. The laptop shows a network connection with an IP address of 169.254.22.115 and a subnet mask of 255.255.0.0. The user cannot access the internet or any network resources. Which of the following is the MOST likely cause?

A user in a small office can access internal network resources by IP address but cannot access any websites by domain name. Other users on the same network can browse the internet without issues. The user's workstation obtains an IP address via DHCP and can successfully ping the default gateway. Which of the following is the MOST likely cause of the issue?

A user in a small office reports that they can access websites on the internet but cannot connect to the company's internal file server using its hostname (\\fileserver). Other users in the same office can access the file server by hostname without any issues. The technician runs ipconfig /all on the affected workstation and sees the following: IPv4 Address: 192.168.1.45, Subnet Mask: 255.255.255.0, Default Gateway: 192.168.1.1, DNS Server: 8.8.8.8. Which of the following is the MOST likely cause of the issue?

An employee connects their laptop to the company network via Ethernet. They can access the internet but cannot connect to internal servers using their hostnames (e.g., \\fileserver). They can ping internal server IPs. The network uses an internal DNS server at 192.168.1.5. The technician checks the laptop's network adapter settings and sees that the DNS server is manually set to 8.8.8.8. Which of the following is the MOST likely cause of the issue?

A user reports that their workstation is displaying an 'IP address conflict' error message and cannot access the network. The technician runs ipconfig and sees IPv4 address 192.168.1.15 with subnet mask 255.255.255.0. Which of the following should the technician do FIRST to resolve the issue?

A small office uses a single unmanaged switch to connect 20 computers. Users report that file transfers between computers are very slow, and the network feels sluggish. The technician notices that the switch's collision LED is blinking frequently. Which of the following is the MOST likely cause of this issue?

A technician is troubleshooting an issue where users in one department cannot access the internet, but they can access shared files on the local network. The router's status lights indicate WAN connectivity is active. Which of the following should the technician check FIRST?

A small office has 10 computers connected to a single switch. The ISP provides a modem with a built-in router and DHCP server. One user reports they cannot access the internet but can access shared files on the local network. The technician checks the IP configuration on the user's computer and sees an IP address of 169.254.12.5. Which of the following is the MOST likely cause?

A technician is troubleshooting a workstation that cannot connect to any network resources. The IP configuration shows an APIPA address (169.254.x.x). Other workstations on the same physical network are functioning normally. What is the MOST likely cause?

A technician is troubleshooting a computer that cannot access any websites by their domain name (e.g., www.example.com) but can access websites by their IP address. The computer's IP configuration shows it received a valid IP address from the DHCP server. Which of the following is the MOST likely cause?

A technician is installing several wireless access points in a large office to provide Wi-Fi coverage. The access points are PoE-capable, but the existing network switches do not support Power over Ethernet. The access points are located too far from available power outlets. Which of the following devices should the technician use to provide both data connectivity and power to the access points?

A technician is troubleshooting a user's laptop that connects to the corporate Wi-Fi network successfully and obtains a valid IP address in the 192.168.x.x range. However, the user cannot access the internet or any internal servers. Other devices on the same Wi-Fi network are working fine. Which of the following should the technician check FIRST?

A technician is troubleshooting a user's workstation that intermittently loses network connectivity. The user says the connection drops for a few seconds and then reconnects. The technician checks the switch port and sees a high number of runt frames. The Ethernet cable is properly connected and passes a cable tester. Which of the following is the MOST likely cause?

A technician sets up a small office network using two unmanaged switches to connect 25 computers. After connecting both switches to the router, the network becomes extremely slow and many computers lose connectivity intermittently. The technician notices that the router's status lights on all ports are flashing rapidly. Which of the following is the MOST likely cause of this issue?

A technician is installing network cabling for a new office. The office has a server room in the basement, and the technician needs to connect workstations on the 2nd floor, which is approximately 120 meters (394 feet) away. The required bandwidth is 1 Gbps. Which cabling type should the technician use?

A user's computer can access the internet and can successfully ping the IP address of a local file server (192.168.1.50). However, the user cannot access the file server by its hostname (fileserver.local). Other computers on the same network can access the file server by hostname without any issues. Which of the following is the MOST likely cause of this problem?

A technician is troubleshooting a small office network. Users on one side of the office report very slow network speeds and occasional disconnections. The technician checks the unmanaged switch and notices that the link LED for the port connected to a particular workstation is rapidly alternating between green and amber. The workstation is able to obtain an IP address. Which of the following is the MOST likely cause of this issue?

A technician is setting up a small office network with a single internet connection from a cable modem. The office has two departments: Accounting and Sales. The technician needs to ensure that devices in Accounting cannot communicate with devices in Sales, but both departments must be able to access the internet. Which feature should the technician configure on the managed switch to meet this requirement?

A technician is setting up a small network. The modem from the ISP provides a single public IP address via DHCP. The technician needs to connect 10 computers to the internet using a single public IP. Which device should the technician install between the modem and the computers to accomplish this?

A technician installs a new VoIP desk phone for a user. The phone is connected to an existing wall jack using a Cat5e patch cable. The switch port on the other end shows a solid link light, but the phone does not power on. The technician verifies that the wall jack is wired correctly and the cable passes a continuity test. Which of the following is the MOST likely reason the phone is not receiving power?

A network technician is configuring a small office network. The office has two departments: Sales and Accounting. The technician needs to ensure that devices in Sales cannot communicate with devices in Accounting, but both departments must be able to access the internet. The network uses a single router and one managed switch. Which of the following should the technician configure on the switch?

A technician is troubleshooting a small office network where users are reporting slow internet speeds. The network consists of a router connected to an unmanaged switch, and several workstations and printers connected to the switch. The technician notices that the cable connecting the router to the switch is a crossover cable. Both the router and the switch support Auto-MDI/X. Which of the following BEST describes the impact of using a crossover cable in this scenario?

A network technician is troubleshooting a new fiber optic link between two buildings. The link is down. The technician uses a visual fault locator (VFL) at the transmitting end and observes a faint red glow at the patch panel in the receiving building. What does this indicate?

A network technician is configuring a small office network. The company wants to ensure that only authorized company devices can connect to the wired network. The network uses a managed switch and a DHCP server. Which security feature should the technician configure on the switch to BEST meet this requirement?

A user reports that they can access internal network resources by IP address but cannot browse the internet by domain name (e.g., www.google.com). The technician checks the workstation's network adapter settings and sees that the IP address is obtained via DHCP. Which of the following is the MOST likely cause of this issue?

A small office network uses a single router connected to a managed switch. The technician has configured two VLANs on the switch: VLAN 10 for Sales and VLAN 20 for Engineering. Both VLANs can access the internet, but devices in Sales cannot reach devices in Engineering. The router has one physical interface connected to the switch. The technician configured a subinterface on the router for each VLAN with appropriate IP addresses. However, devices on VLAN 20 cannot access the internet, while VLAN 10 works fine. Which of the following is the MOST likely missing configuration?

A small office uses a router with a built-in switch and a separate wireless access point. Users on the wired network can access the internet and internal resources, but wireless users cannot access any internal resources. Wireless users can connect to the access point and obtain an IP address in the 192.168.2.0/24 range, while wired users are on 192.168.1.0/24. The router's LAN interface is 192.168.1.1/24, and the access point is connected to the router's switch port and has an IP of 192.168.1.100/24. Which of the following is the MOST likely cause?

A network technician is setting up a wireless access point (AP) for a small business. The company's router provides DHCP for the 192.168.1.0/24 network. The AP needs to broadcast two SSIDs: one for employees and one for guest users. The guest network must be completely isolated from the employee network and internal resources, while both SSIDs must have internet access. The AP is connected to a managed switch. Which configuration will BEST meet these requirements?

A network technician is configuring a small office network with one router and one managed switch. The network has two VLANs: VLAN 10 (Sales) and VLAN 20 (Engineering). Both VLANs need internet access, and inter-VLAN routing is not required. The technician configures the router's single physical interface with IP 192.168.1.1/24 and creates subinterfaces for VLAN 10 (192.168.10.1/24) and VLAN 20 (192.168.20.1/24). The switch port connecting to the router is configured as an access port in VLAN 10. Which of the following is the MOST likely result?

A network technician is configuring a router-on-a-stick for inter-VLAN routing. The router has one physical interface (G0/0) connected to a managed switch. The technician creates subinterfaces G0/0.10 for VLAN 10 (192.168.10.1/24) and G0/0.20 for VLAN 20 (192.168.20.1/24). The switch port connected to the router is configured as a trunk allowing VLANs 10 and 20. On a workstation in VLAN 10, the technician can ping the gateway 192.168.10.1 but cannot ping the gateway 192.168.20.1. Which of the following is the MOST likely cause?

A small office recently installed 12 new VoIP phones. Each phone is connected via an Ethernet cable to a 24-port managed PoE+ switch. The switch is powered on, and the network cables are properly terminated. However, none of the VoIP phones power on. The switch's power LED is solid, but the port LEDs remain off. Which of the following is the MOST likely cause?

A network technician is configuring a small office network with one router and one managed switch. The switch has two VLANs: VLAN 10 for Sales and VLAN 20 for Engineering. Both VLANs need internet access. The technician configures the router's single physical interface (G0/0) with subinterfaces G0/0.10 for VLAN 10 (192.168.10.1/24) and G0/0.20 for VLAN 20 (192.168.20.1/24). The switch port connected to the router is configured as an access port in VLAN 10. Which of the following is the MOST likely result of this configuration?

A network technician is installing a new fiber optic link between two switches located in different buildings. The technician uses identical SFP modules on both ends and connects them with a single fiber patch cable. After powering on, the link lights on both switches remain off. The technician verifies the SFP modules are compatible with the switches and that the cable is not damaged. Which of the following should the technician check NEXT?

A small business has a 24-port PoE+ switch powering 12 IP cameras (each requiring 15W) and 8 VoIP phones (each requiring 6W). The switch has a PoE budget of 240W. A technician installs two additional IP cameras (each 15W) but they do not power on. The existing cameras and phones continue to work normally. The technician has verified the Ethernet cables are good and the ports are enabled. Which of the following is the MOST likely cause?

A network technician configures a managed switch with two VLANs: VLAN 10 (Marketing: 192.168.10.0/24) and VLAN 20 (Engineering: 192.168.20.0/24). The switch is connected to a router via a single trunk port. The router has subinterfaces configured: G0/0.10 with IP 192.168.10.1/24 and G0/0.20 with IP 192.168.20.1/24. A workstation in Marketing can ping its own default gateway (192.168.10.1) but cannot ping the Engineering gateway (192.168.20.1). Which of the following is the MOST likely cause?

A small office recently installed eight new VoIP phones. Each phone is connected via an Ethernet cable to a 24-port managed PoE+ switch. The switch is powered on, and the network cables are properly terminated. However, none of the VoIP phones power on. The switch's power LED is solid, but the port LEDs for the connected phones remain off. The technician verifies that the PoE budget of the switch (240W) is sufficient for all eight phones (each requiring 6.5W). Which of the following is the MOST likely cause?

A technician is troubleshooting a workstation that cannot connect to the network. The link light on the network interface card is blinking amber, and the switch port shows no link light. The Ethernet cable run from the workstation to the patch panel is approximately 125 meters. Which of the following is the MOST likely cause of the connectivity issue?

A network technician is troubleshooting intermittent connectivity issues on a small office network. The issue only occurs for a few minutes at a time, and users lose access to both internal servers and the internet. During the issue, the technician can ping the default gateway from the core switch but not from the router. The router logs show multiple 'Duplicate IP address' errors for the router's LAN interface. Which of the following is the MOST likely cause?

A user reports that they cannot access any websites through their web browser, but they can access shared files on the local network and can successfully ping 8.8.8.8 from the command prompt. The technician checks the IP configuration and finds the workstation has a valid IP address, subnet mask, and default gateway. The DNS server is set to 8.8.8.8. Which of the following is the MOST likely cause of the issue?

A technician connects a workstation to a switch port configured for VLAN 30. The network uses DHCP servers located on VLAN 10. After connecting, the workstation receives an APIPA address (169.254.x.x). The technician verifies that the Ethernet cable is functional and the switch port link light is solid. Other workstations on the same switch, connected to ports in VLAN 10, obtain valid IP addresses. Which of the following is the MOST likely cause of the issue?

A technician configures a new workstation on a managed switch port. The workstation successfully obtains an IP address from the DHCP server and can ping its own IP address as well as the default gateway. However, it cannot ping any other workstations on the same subnet. The technician has verified that the Ethernet cable is good and the switch port link is up. Which of the following should the technician check NEXT?

A user reports that their laptop cannot access the internet but can still access shared files on the local network. The technician runs ipconfig and sees an IP address of 169.254.15.32. Which of the following is the MOST likely cause of this issue?

A technician connects a new workstation to a switch port that is configured with port security and a maximum of one MAC address. After connecting the workstation, the port link LED remains off. The technician has verified the Ethernet cable is good, the switchport is not administratively down, and the workstation's NIC is functioning. Which of the following is the MOST likely cause?

A small office network uses an unmanaged switch to connect 20 workstations to a router. After connecting the 11th workstation, all previously connected workstations begin losing internet connectivity intermittently. The switch link lights remain solid green for all connected devices. The technician discovers that the new workstation has two active network interfaces, both plugged into the same switch. Which of the following is the MOST likely cause?

A network technician connects two switches together using a straight-through Cat6 Ethernet cable. Both switches are managed and are known to be working. After connecting, the link LED on Switch A is off, and the link LED on Switch B is also off. The technician has verified that both switch ports are enabled and not administratively shut down. Which of the following is the MOST likely cause of the problem?

A user reports that their laptop cannot detect any wireless networks. The technician sees that the Wi-Fi adapter is enabled in the device manager and has no errors. The laptop has a physical wireless switch on the front edge and a function key (Fn) combination to toggle Wi-Fi. Which of the following should the technician check FIRST?

A technician installs a new PoE security camera in an office. The camera is connected to a wall jack that runs to a PoE-enabled switch. The camera does not power on. The technician tests the cable with a cable tester and it passes. The switch port has a solid link light. The technician connects a known-working laptop to the same wall jack, and the laptop gets an IP address and can access the network. Which of the following is the MOST likely cause of this issue?

A technician is setting up a small office network with 15 computers, a router, and an unmanaged switch. The computers are configured with static IP addresses. After connecting all computers to the switch, the technician notices that some computers can communicate with each other but cannot access the internet. The router's LAN IP is 192.168.1.1 with subnet mask 255.255.255.0. The computers have IP addresses in the range 192.168.1.2-192.168.1.16 with default gateway 192.168.1.1. The technician pings the router from a computer that cannot access the internet, and the ping times out. Which of the following is the MOST likely cause?

A network administrator is setting up a new wireless network for a small business. The administrator configures a wireless access point with WPA2-PSK and a strong passphrase. Several users on different floors report intermittent connectivity and slow speeds. The administrator checks the access point and finds that the signal strength is excellent in the area. The access point is dual-band (2.4GHz and 5GHz) and broadcasts a single SSID. Which of the following is the MOST likely cause of the issue?

A technician is configuring a small office network with a PoE-managed switch and several VoIP phones. All phones are connected and working except one. On the non-working phone, the Ethernet link light is solid on both the phone and the switch port, but the phone's display remains dark and it does not power on. The technician has verified the cable with a tester and it passes. The switch port is enabled and configured for the same VLAN as other working phones. Which of the following is the MOST likely cause?

A network technician configures a managed switch with two VLANs: VLAN 10 for workstations and VLAN 20 for servers. A workstation on VLAN 10 can ping its default gateway (192.168.10.1), and a server on VLAN 20 can ping its default gateway (192.168.20.1). However, the workstation cannot ping the server's IP address (192.168.20.10). All switch ports are configured as access ports in their respective VLANs, and the default gateways are correctly assigned. Which of the following is MOST likely needed to allow this communication?

A small office uses a single router with DHCP enabled for 50 devices. Recently, some devices cannot obtain an IP address, while others work fine. The technician checks the DHCP lease table and sees that it is nearly full with 49 active leases. The network uses a default Class C subnet (255.255.255.0). Which of the following is the MOST appropriate solution to ensure all devices can obtain an IP address in the future?

A technician is troubleshooting a workstation that can access internal network resources and the internet, but users report that they cannot browse websites using domain names (e.g., www.example.com). The technician opens a command prompt and successfully pings a public IP address (8.8.8.8), but pinging www.google.com returns 'Ping request could not find host'. The workstation receives IP settings via DHCP. Which of the following is the MOST likely cause?

A user reports that their workstation cannot access the internet. The technician runs ipconfig and sees that the workstation has an IP address of 169.254.23.45 with a subnet mask of 255.255.0.0. The technician checks the network cable and link lights; they are normal. Which of the following is the MOST likely cause?

A user reports that their workstation cannot access the internet or any network resources. The technician runs ipconfig and sees the IP address 169.254.10.55 with subnet mask 255.255.0.0. The Ethernet link lights are solid on both the NIC and the switch port. Which of the following is the MOST likely cause?

A technician is setting up a small office network with a managed switch, a router (192.168.1.1/24), and 20 workstations. All workstations are connected to the switch and configured with static IPs in the range 192.168.1.2-192.168.1.21, subnet mask 255.255.255.0, default gateway 192.168.1.1. All workstations can ping the router successfully, but some workstations cannot ping each other. Which of the following is the MOST likely cause?

A user reports that their workstation can access local network shares and printers but cannot access the internet. The technician pings the default gateway (192.168.1.1) successfully. The technician pings a public DNS server (8.8.8.8) and the request times out. Which of the following is the MOST likely cause?

A technician connects a new workstation to a managed switch port that is configured with PortFast and BPDU guard. The workstation obtains an IP address via DHCP and can ping its own IP address, but it cannot ping any other devices on the local network, including the default gateway. The link light on both the NIC and switch port is solid green. On the switch, the port status shows 'errdisable' with the reason 'BPDU guard'. Which of the following is the MOST likely cause of this issue?

A user reports that they cannot access the company intranet website at http://intranet. The technician opens a browser on the workstation and types the IP address 192.168.10.5, which successfully loads the intranet page. The workstation is configured to obtain IP settings automatically via DHCP. Which of the following is the MOST likely cause of the issue?

A technician is configuring a small office network with a managed switch. A new employee's workstation is connected to port 12 on the switch. The workstation receives an IP address from the DHCP server and can ping the default gateway (192.168.1.1), but it cannot ping the file server at 192.168.1.50. Other workstations on the same subnet can ping the file server. The technician checks the switch configuration and sees that port 12 is assigned to VLAN 10, while all other workstations and the file server are on VLAN 1. Which of the following is the MOST likely reason the workstation cannot reach the file server?

A technician is setting up a new workstation. After connecting the Ethernet cable, the link light on the NIC and the switch port are solid green. The technician runs ipconfig and sees an IP address of 169.254.3.45 with a subnet mask of 255.255.0.0. The workstation cannot ping the default gateway or any other network devices. Which of the following is the MOST likely cause?

A technician connects a new workstation to a managed switch port. The workstation receives an IP address from the DHCP server and can ping its own IP address, but it cannot ping any other devices on the local network, including the default gateway. The technician verifies that the Ethernet cable is functional and that the link lights are solid on both the NIC and the switch port. Which of the following is the MOST likely cause of this issue?

A user reports that they can browse the internet and receive emails but cannot send emails using their email client. The email client is configured to use the company's email server. The technician verifies that other users in the same office can send and receive emails without any issues. The workstation's software firewall is disabled. Which of the following is the MOST likely cause of the issue?

A small office has a network with 25 workstations connected to a managed switch. The switch is connected to a router that provides DHCP. Workstations receive IP addresses in the 192.168.1.0/24 range. A technician replaces a failed switch with a new managed switch of the same model. After connecting all devices, all workstations obtain IP addresses and can ping the default gateway (192.168.1.1). However, workstations cannot ping each other. The technician checks the switch configuration and sees that all ports are in the default VLAN 1 with no port security. Which of the following is the MOST likely cause?

A workstation has an APIPA address beginning with 169.254 after being moved to a new office. Other users in the office can access the network. What is the most likely issue?

A user has link lights on a network port but receives very slow file transfers. The switch reports many CRC errors on the port. What is the most likely cause?