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Difficulty: EasyVLAN Configuration and 802.1Q Trunking

Match each VLAN configuration term on the left with its corresponding operational behavior on the right.

  • Native VLANCarries untagged frame traffic across an 802.1Q trunk link without modifying the Ethernet frame header.
  • Access PortConnects to an end-host device and carries traffic for only one assigned VLAN using standard untagged frames.
  • 802.1Q TaggingInserts a 4-byte header into the Ethernet frame to identify the source VLAN across switch-to-switch links.
  • Trunk PortCarries traffic for multiple VLANs simultaneously over a single physical link between network switches.

Answer

Native VLAN matches with carrying untagged frame traffic across an 802.1Q trunk link without modifying the Ethernet frame header. Access Port matches with connecting to an end-host device and carrying traffic for only one assigned VLAN using standard untagged frames. 802.1Q Tagging matches with inserting a 4-byte header into the Ethernet frame to identify the source VLAN across switch-to-switch links. Trunk Port matches with carrying traffic for multiple VLANs simultaneously over a single physical link between network switches.
Each concept aligns directly with its fundamental operation: Native VLAN handles untagged trunk traffic, Access Ports connect end-user devices on a single VLAN, 802.1Q Tagging inserts a 4-byte VLAN identifier into frames, and Trunk Ports carry traffic for multiple VLANs across a single physical link.

Step-by-Step Solution

1
Identify the purpose of Native VLAN on 802.1Q trunks.
Determine that Native VLAN handles untagged frame traffic across trunk connections.
By default in 802.1Q trunking, frames belonging to the designated native VLAN are transmitted without an 802.1Q tag.
2
Distinguish between Access Ports and Trunk Ports.
Match Access Port to single-VLAN host connectivity and Trunk Port to multi-VLAN inter-switch links.
Access ports service host devices on a single broadcast domain, while trunk ports multiplex multiple VLANs across network switches.
3
Identify the mechanism of 802.1Q frame encapsulation.
Match 802.1Q Tagging with inserting a 4-byte header into Ethernet frames.
The 802.1Q standard identifies frame VLAN membership by inserting a 4-byte field containing the VLAN ID into frame headers.

Key Concept

VLAN Configuration and 802.1Q Trunking Fundamentals
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Topics

VLAN Configuration and 802.1Q Trunking

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