Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) — Question 339

How much must the MTU be increased when configuring the 802.1q VLAN tag?

Answer options

• A. 2 bytes
• B. 4 bytes
• C. 8 bytes
• D. 12 bytes

Correct answer: B

Explanation

The MTU must be increased by 4 bytes to accommodate the 802.1q VLAN tag, which adds this amount of overhead to each frame. Options A, C, and D are incorrect as they do not reflect the correct overhead size required for VLAN tagging.