VLAN Trunking Protocols

This subtopic introduces two examples of trunking protocols.

VLAN2

VLAN2

Trunking VLAN1 and VLAN2

802.1Q or ISL

VLAN2

VLAN1

VLAN1

VLAN1

A special protocol is required to establish a trunk link between two devices. A trunk link may exist between these devices:

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