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220-1101 SW1 and SW2 VLAN Trunking Practice Questions

Use this page to practise 220-1101 SW1 and SW2 VLAN Trunking Practice Questions practice questions. The goal is not to memorise dumps, but to understand the concept, review the explanation and improve your exam readiness.

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15
scenario questions
220-1101
exam code
CompTIA
vendor

Scenario guide

How to approach sw1 and sw2 vlan trunking practice questions

Practise switch scenarios involving SW1, SW2, VLANs, trunk links, allowed VLAN lists and show interfaces trunk output.

Quick answer

VLAN and trunking questions usually test whether the VLAN exists, whether the trunk is active and whether the VLAN is allowed across the link.

Access ports, trunk ports and native VLAN behaviour.

Allowed VLAN lists and trunk verification.

How to read show vlan brief and show interfaces trunk output.

Why hosts in the same VLAN may fail across switches.

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Practice set

Practice scenarios

Question 1mediummultiple choice
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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?

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Question 2mediummultiple choice
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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?

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Question 3hardmultiple choice
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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?

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Question 4hardmultiple choice
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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?

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Question 5hardmultiple choice
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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?

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Question 6hardmultiple choice
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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?

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Question 7hardmultiple choice
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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?

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Question 8mediummultiple choice
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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?

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Question 9mediummultiple choice
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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?

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Question 10hardmultiple choice
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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?

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Question 11mediummultiple choice
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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?

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Question 12easymultiple choice
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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?

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Question 13mediummultiple choice
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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?

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Question 14mediummultiple choice
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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?

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Question 15hardmultiple choice
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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?

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