Networking Concepts

Which of the following is a characteristic of UDP?

A network technician is analyzing a small office network topology. An 8-port switch has 7 workstations directly connected. The remaining switch port is connected to a 4-port hub, which has 4 workstations attached. All devices are configured on the same VLAN and IP subnet. How many collision domains and broadcast domains are present in this network?

Which of the following is a characteristic of a Layer 2 broadcast domain?

Which of the following best describes the primary difference between a hub and a switch?

A router has two routes to the same destination network: one learned via OSPF with a metric of 10, and another learned via EIGRP with a composite metric of 3072. The default administrative distances are OSPF=110, EIGRP=90. Which route will be installed in the routing table?

An IPv6 address has the prefix 2001:db8::/32. Which of the following IP addresses belongs to the same prefix?

A network technician is explaining the process of resolving Layer 2 addresses to Layer 3 addresses on a local network. Which protocol is used by a host to determine the MAC address of another host given its IP address?

A network engineer is troubleshooting a communication issue between two hosts. The engineer determines that the data is being segmented at the source and reassembled at the destination, but the segments are arriving out of order. Which OSI layer is responsible for sequencing the segments?

A network administrator is configuring BGP between two autonomous systems. Which BGP attribute is primarily used to influence inbound traffic to a particular AS?

A network administrator is configuring IP addresses for a new subnet. The network address is 192.168.1.0 with a subnet mask of 255.255.255.240. How many usable host addresses are available on this subnet?

A network technician is explaining the role of a network switch to a new employee. Which of the following best describes the primary function of a switch in a local area network?

Which of the following network topologies provides the highest level of redundancy and fault tolerance?

At which layer of the OSI model does a network device encapsulate data into frames and add source and destination MAC addresses?

A network administrator wants to automate IP address assignment for client devices. Which protocol should be used?

A network technician is explaining the difference between a hub and a switch to a junior technician. Which statement correctly describes a key difference between these devices?

A network engineer is designing a new IPv6 addressing scheme. The company has been assigned a /48 prefix and needs to support up to 250 subnets. Which subnet size should be used to minimize waste while meeting the requirement?

A network technician is explaining the difference between connection-oriented and connectionless protocols to a junior technician. Which of the following protocols is connectionless at the transport layer?

A client obtains an IP address from a DHCP server but cannot resolve hostnames. The client can ping the default gateway and external IP addresses successfully. What is the most likely cause?

In the OSI model, which layer is responsible for establishing, managing, and terminating sessions between applications, as well as providing checkpoints and recovery?

Which layer of the OSI model is responsible for logical addressing and routing of packets between networks?

Which transport layer protocol is used by VoIP and streaming video because it provides low latency and does not require retransmission?

At which layer of the OSI model does a device provide flow control, error detection, and recovery for end-to-end communication?

A junior network technician asks which device operates at Layer 2 of the OSI model and uses MAC addresses to forward frames. Which device is the technician describing?

Which of the following best describes the purpose of the TCP three-way handshake?

Which IPv6 address type is used for one-to-many communication and is similar to an IPv4 multicast address?

Which device operates at Layer 1 (Physical) of the OSI model and regenerates electrical signals to extend the distance of a network segment?

In a network, a collision domain is a network segment where which of the following is true?

Which of the following uniquely identifies a hardware network interface on a device?

Which network topology connects all devices to a central device?

A network technician is assigned a subnet mask of 255.255.255.248. How many usable host addresses are available in this subnet?

A network technician is configuring a small office network with two subnets: 10.0.1.0/24 and 10.0.2.0/24. Each subnet has its own switch, and both switches are connected to a router with interfaces 10.0.1.1 and 10.0.2.1. Hosts on subnet A can ping the router's interface in their subnet but cannot ping hosts on subnet B. Which of the following is the most likely cause?

A network technician is troubleshooting a workstation that can reach devices on its local subnet but cannot access any hosts on remote networks. The technician runs ipconfig and sees that the workstation has a valid IP address and subnet mask but no default gateway configured. Which of the following best describes why the missing default gateway causes this behavior?

A network has a single switch with VLANs 10, 20, and 30 configured. The switch is connected to a router that has three subinterfaces, each in a different VLAN. How many broadcast domains are present?

Which of the following protocols is used to automatically assign IP addresses to devices on a network and also provides the subnet mask and default gateway?

Which device is used to connect two different network segments and makes forwarding decisions based on IP addresses?

Which of the following best describes the primary function of a subnet mask in IPv4 networking?

At which layer of the OSI model does end-to-end communication and data segmentation occur?

A network device receives a frame on one port and forwards it out to all other ports. The device does not examine the destination MAC address. Which type of device is being described?

A network technician is explaining network segmentation to a junior technician. Which of the following devices increases the number of collision domains but does not increase the number of broadcast domains?

A network technician is explaining the OSI model to a junior technician. The technician mentions that the Transport layer is responsible for end-to-end communication and data segmentation. Which protocol operates at the Transport layer?

A network technician is reviewing the OSI model to understand how data is encapsulated when a web request is sent from a client to a server. At which layer does the web browser's HTTP request data get encapsulated with a TCP segment header?

Which of the following describes the purpose of a default gateway on a host in a TCP/IP network?

A client and server are establishing a TCP connection. The client sends a SYN segment to the server. The server responds with a SYN-ACK segment. What is the next segment in the handshake?

Which of the following describes a unicast transmission?

A network engineer is designing a subnet to accommodate 50 devices in a single broadcast domain. The engineer uses a /26 subnet mask. How many usable host addresses are available?

An engineer is configuring a network and needs to understand the default behavior of an IPv6 node. When an IPv6 interface is initialized, which type of address is automatically assigned without any configuration server?

A network engineer is reviewing RFC 1918 address ranges to plan a private IP addressing scheme. Which of the following IP addresses falls within the private address space for Class A?

A network engineer wants to segment a LAN into multiple broadcast domains without purchasing additional hardware. Which of the following technologies should be implemented?

At which layer of the OSI model does the conversion of data frames into electrical signals for transmission occur?

Which of the following is a characteristic of a Layer 2 network switch?

A network device receives a frame and forwards it based on the destination MAC address. The device does not modify the frame and only floods unknown unicast frames. At which layer of the OSI model does this device operate?

A network administrator needs to ensure that data sent from a host arrives at the correct destination on a different network. Which of the following provides the logical address used for this purpose in IPv4?

A network technician is explaining the concept of encapsulation to a junior technician. At which OSI layer does a packet get encapsulated with a source and destination IP address?

Which of the following IPv6 addresses is a link-local address?

A network administrator wants to segment the network into multiple virtual LANs to reduce broadcast traffic. Which device is required to route traffic between these VLANs?

Which of the following is a characteristic of UDP when compared to TCP?

Which of the following network devices operates at Layer 1 of the OSI model and forwards all incoming electrical signals to all of its ports?

At which layer of the OSI model does a switch that uses MAC addresses to forward frames operate?

Which of the following best describes the function of a default gateway?

A network engineer is designing a network and needs to ensure that broadcast traffic is contained within a single broadcast domain. Which of the following devices should be used to create these separate broadcast domains?

Which of the following IP addresses is a private IP address as defined by RFC 1918?

Which of the following network topologies connects each node to exactly two other nodes, forming a closed loop?

Which IPv6 address is reserved for loopback?

A workstation with IP address 10.0.1.5/24 needs to communicate with a server at 10.0.2.10/24. The workstation's default gateway is configured as 10.0.1.1. Which of the following will the workstation do with the IP packets destined for the server?

A network technician is explaining the function of a default gateway to a junior technician. Which of the following best describes the purpose of a default gateway?

Which of the following network devices operates primarily at Layer 2 of the OSI model and uses MAC addresses to forward data?

Which of the following protocols is used to automatically assign IP addresses to devices on a network?

A network engineer is designing a network for a large organization. The engineer needs to ensure that broadcast traffic from one VLAN does not propagate to other VLANs while still allowing inter-VLAN communication. Which of the following devices is required to route between VLANs?

A network administrator wants to logically segment a single physical switch into multiple separate broadcast domains without purchasing additional hardware. Which concept should be used?

A network engineer needs to connect two network segments that use different physical media: one segment uses copper Ethernet and the other uses fiber optic. The device must forward frames based on MAC addresses and must not perform any routing. Which device should the engineer choose?

A network switch is experiencing a high number of collisions on a specific port. The connected device is configured for half-duplex. Which of the following is the most likely cause?

A network engineer needs to create subnets for four departments, each requiring at least 50 host addresses. The available network is 192.168.1.0/24. Which subnet mask should be used to satisfy the requirements while minimizing wasted addresses?

Which of the following IPv6 addresses is a valid link-local address?

A network technician is explaining the difference between TCP and UDP to a junior technician. Which of the following correctly identifies a characteristic of TCP but NOT of UDP?

A network switch forwards frames based on which address?

A network switch that forwards frames based on MAC addresses operates at which layer of the OSI model?

A network engineer is designing a new office network and needs to choose a routing protocol that supports variable-length subnet masks and fast convergence for a small to medium-sized enterprise. The engineer wants a link-state protocol that uses cost as its metric. Which of the following should the engineer select?

Match each network protocol to its well-known port number.

A network administrator is designing a small office network with 40 workstations. The design must ensure that a single cable failure only affects the connected workstation. Which logical topology should the administrator implement?

Which of the following is the primary function of a subnet mask in IPv4 networking?

Which of the following network protocols operates at the Transport layer of the OSI model and provides connection-oriented, reliable data delivery?

Which of the following best describes a broadcast domain?

Which of the following best describes the function of a default gateway on a host?

A network administrator needs to connect 10 workstations in a way that each workstation's traffic does not collide with others. Which device should be used to connect these workstations?

At which OSI layer does a router primarily operate to make forwarding decisions based on IP addresses?

Which protocol is used to resolve a known IP address to a corresponding MAC address on a local network?

Which of the following best describes the primary function of the transport layer in the OSI model?

A network administrator is troubleshooting a connectivity issue and suspects the problem is related to the physical cabling. At which layer of the OSI model should the administrator begin their investigation?