Cisco Certified Network Associate (CCNA) 200-301 — Question 91

The correct answer is C, D. Option C: Add or remove an 802.1Q trunking header. Option D: Match the destination MAC address to the MAC address table.

Explanation

IEEE 802.1Q inserts a VLAN tag into Ethernet frames carried over a trunk. A trunk carries traffic for multiple VLANs between network devices. A switch learns source MAC addresses and maps them to ingress ports in its MAC address table.