Practice Test Geeks(ICND1) Interconnecting Cisco Networking Devices Part 1 Practice Test
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VLAN Management Flashcards

7 cards from real ICND1 practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. A switch has VTP revision number 100. A new switch with revision number 150 is connected. What is the likely outcome?

    Answer: The new switch overwrites the domain's VLAN database with its higher revision

    VTP always synchronizes to the highest revision number, so the new switch's database overwrites the domain's existing VLAN configuration—a common accidental outage scenario.

  2. Which command changes the native VLAN of a trunk to VLAN 99?

    Answer: switchport trunk native vlan 99

    'switchport trunk native vlan 99' sets the native VLAN for untagged traffic on an 802.1Q trunk to VLAN 99.

  3. What is a voice VLAN on a Cisco switch access port?

    Answer: A second VLAN on an access port that tags voice traffic for IP phones

    A voice VLAN enables an access port to carry two VLANs: one untagged for the PC and one tagged (voice VLAN) for the IP phone connected to the same port.

  4. An administrator wants to see which VLANs are currently active and forwarding on trunk interface Gi0/1. Which command helps?

    Answer: show interfaces gi0/1 trunk

    'show interfaces gi0/1 trunk' displays the VLANs allowed, active, and forwarding on that specific trunk port.

  5. Inter-VLAN routing using a 'router-on-a-stick' configuration requires which interface type on the router?

    Answer: Subinterfaces with 802.1Q encapsulation

    Router-on-a-stick uses a single physical interface divided into logical subinterfaces, each configured with 'encapsulation dot1q ' to route between VLANs.

  6. Which statement correctly describes extended-range VLANs (1006–4094)?

    Answer: They require VTP version 3 or transparent mode to be propagated/stored

    Extended-range VLANs (1006–4094) are stored in running-config rather than vlan.dat and require VTP version 3 or VTP transparent mode for proper operation.

  7. What does the command 'switchport trunk allowed vlan add 40' accomplish?

    Answer: Appends VLAN 40 to the existing list of allowed trunk VLANs

    The 'add' keyword appends the specified VLAN to the current allowed list without removing any previously permitted VLANs.