CCNA: Cisco Certified Network Associate — Question 175

An engineer must establish a trunk link between two switches. The neighboring switch is set to trunk or desirable mode. What action should be taken?

Answer options

• A. configure switchport nonegotiate
• B. configure switchport mode dynamic desirable
• C. configure switchport mode dynamic auto
• D. configure switchport trunk dynamic desirable

Correct answer: B

Explanation

The correct action is to use 'configure switchport mode dynamic desirable' (option B), which enables the port to actively negotiate a trunk link. The other options do not facilitate the required trunking configuration: option A disables negotiation, option C only allows the port to become a trunk if the neighbor requests it, and option D has incorrect syntax as it combines 'trunk' with 'dynamic'.