300-320 · Question #309
Which L2 messaging protocol maintains VLAN configuration consistency?
The correct answer is A. VTP. VLAN Trunking Protocol (VTP) is a Cisco proprietary Layer 2 messaging protocol that propagates VLAN database information (additions, deletions, and renames) from a VTP Server to VTP Client switches across trunk links, ensuring all switches in the same VTP domain have a…
Question
Which L2 messaging protocol maintains VLAN configuration consistency?
Options
- AVTP
- BSTP
- CLACP
- DCDP
How the community answered
(19 responses)- A95% (18)
- D5% (1)
Explanation
VLAN Trunking Protocol (VTP) is a Cisco proprietary Layer 2 messaging protocol that propagates VLAN database information (additions, deletions, and renames) from a VTP Server to VTP Client switches across trunk links, ensuring all switches in the same VTP domain have a consistent VLAN configuration. STP (Option B) is a loop-prevention protocol, not a VLAN management protocol. LACP (Option C) is IEEE 802.3ad and is used for negotiating and managing link aggregation groups (EtherChannels). CDP (Option D) is Cisco Discovery Protocol, used for discovering neighboring Cisco devices and exchanging device information - it does not manage VLAN configurations.
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