CCNA: Cisco Certified Network Associate — Question 242

An engineer must configure interswitch VLAN communication between a Cisco switch and a third-party switch. Which action should be taken?

Answer options

• A. configure DSCP
• B. configure IEEE 802.1q
• C. configure ISL
• D. configure IEEE 802.1p

Correct answer: B

Explanation

The correct answer is B, as IEEE 802.1q is the standard for VLAN tagging that allows for interswitch communication across different vendors. Options A, C, and D do not provide the necessary VLAN tagging required for interoperability between Cisco and third-party switches.