200-301 · Question #856
Which of the following protocols are used to auto negotiate trunk formation between two switches?
The correct answer is C. DTP. The Dynamic Trunking Protocol (DTP) is a Cisco proprietary protocol used to automatically negotiate whether a link between two switches should become a trunk.
Question
Options
- ACDP
- BVTP
- CDTP
- DSTP
How the community answered
(20 responses)- A5% (1)
- B5% (1)
- C90% (18)
Why each option
The Dynamic Trunking Protocol (DTP) is a Cisco proprietary protocol used to automatically negotiate whether a link between two switches should become a trunk.
CDP (Cisco Discovery Protocol) is used for discovering information about directly connected Cisco devices but does not negotiate trunk formation.
VTP (VLAN Trunking Protocol) manages the addition, deletion, and renaming of VLANs across a switched network but does not negotiate the trunk link itself.
DTP (Dynamic Trunking Protocol) is a Cisco-specific protocol that allows switch ports to dynamically negotiate whether they should form a trunk link, and if so, which trunking mode to use.
STP (Spanning Tree Protocol) prevents network loops by blocking redundant paths, but it is not involved in the auto-negotiation of trunk links.
Concept tested: Dynamic Trunking Protocol (DTP)
Source: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3560/software/release/12_2_55_se/configuration/guide/scg/swvlan.html
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