Virtual LANs Questions and Answers

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Virtual LANs (VLANs) questions with answers are common in networking reasoning questions and answers for technical placements and IT certifications. VLANs help segment network traffic logically, improving efficiency and security. In exams conducted by companies like Cisco, Wipro, and Infosys, students are tested on concepts like VLAN configuration, tagging, and network management. Practicing these logical reasoning questions for networking helps build a deeper understanding of how VLANs support scalable enterprise networks. Each question includes clear explanations to help learners grasp core networking logic.

Virtual LANs

Showing 10 of 17 questions

11. Which of the following provide inter-switch VLAN communication?     ISL     VTP     802.1Q     802.3Z

  • 2 only
  • 1 and 3
  • 2 and 4
  • 2, 3 and 4
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12. A switch has been configured for three different VLANs: VLAN2, VLAN3, and VLAN4. A router has been added to provide communication between the VLANs. What type of interface is necessary on the router if only one connection is to be made between the router and the switch?

  • 10Mbps Ethernet
  • 56Kbps Serial
  • 100Mbps Ethernet
  • 1Gbps Ethernet
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13. Which of the following are benefits of VLANs?     They increase the size of collision domains.     They allow logical grouping of users by function.     They can enhance network security.     They increase the size of broadcast domains while decreasing the number of collision domains.     They simplify switch administration.     They increase the number of broadcast domains while decreasing the size of the broadcast domains.

  • 1 and 5
  • 2 and 4
  • 1, 3 and 5
  • 2, 3 and 6
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14. Which of the following protocols are used to configure trunking on a switch?     VLAN Trunk Protocol     VLAN     802.1Q     ISL

  • 1 only
  • 3 only
  • 3 and 4
  • 1, 3 and 4
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15. What VTP mode allows you to change VLAN information on the switch?

  • Client
  • STP
  • Server
  • Transparent
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16. You connect a host to a switch port, but the new host cannot log into the server that is plugged into the same switch. What could the problem be?

  • The router is not configured for the new host.
  • The VTP configuration on the switch is not updated for the new host.
  • The host has an invalid MAC address.
  • The switch port the host is connected to is not configured to the correct VLAN membership.
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17.  Which of the following is an IEEE standard for frame tagging?

  • ISL
  • 802.3Z
  • 802.1Q
  • 802.3U
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