Implementing Cisco IP Switched Networks (CCNP SWITCH, legacy) — Question 137

Which statement about using native VLANs to carry untagged frames is true?

Answer options

• A. Cisco Discovery Protocol version 2 carries native VLAN information, but version 1 does not.
• B. Cisco Discovery Protocol version 1 carries native VLAN information, but version 2 does not.
• C. Cisco Discovery Protocol version 1 and version 2 carry native VLAN information.
• D. Cisco Discovery Protocol version 3 carries native VLAN information, but versions 1 and 2 do not.

Correct answer: A

Explanation

The correct answer is A because Cisco Discovery Protocol version 2 (CDPv2) includes support for native VLAN information, while CDPv1 does not. Options B and C are incorrect as they misrepresent the capabilities of the different CDP versions regarding native VLAN information. Option D is also incorrect as CDPv3 does not exist, and previous versions do not support native VLAN information.