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Difficulty: EasyVLAN Configuration and 802.1Q Trunking

A network technician is configuring an interface on a network switch that connects directly to another switch. The link between the switches must transmit traffic for multiple VLANs across a single physical cable using IEEE 802.1Q tagging. Which interface operational mode should be configured on this port?

  1. Trunk modeAnswer
  2. B
    Access mode
  3. C
    Native mode
  4. D
    SPAN mode

Answer

Trunk mode
Trunk mode allows a switch interface to carry traffic for multiple VLANs over a single physical link by adding 802.1Q tags to identify frame membership.

Step-by-Step Solution

1
Identify the connectivity requirement for the inter-switch link.
The single physical connection must carry frames belonging to multiple distinct VLANs.
Switches require a method to identify which VLAN a frame belongs to when sending traffic over a shared inter-switch link.
2
Select the appropriate interface operational mode.
Configuring the interface in trunk mode enables IEEE 802.1Q frame tagging to multiplex multiple VLANs over the link.
Trunk ports apply 802.1Q tags to outgoing frames and read tags on incoming frames, whereas access ports support only one untagged VLAN.

Key Concept

802.1Q Trunk Interface Configuration
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Topics

VLAN Configuration and 802.1Q Trunking

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