What is VLAN tagging (802.1Q), and how does it affect trunk and access ports?

• A. VLAN tagging inserts a 4-byte tag into frames to indicate VLAN; trunk ports carry multiple VLANs with tags; access ports carry a single VLAN and do not tag frames.
• B. VLAN tagging encrypts frames; trunk ports disable tagging; access ports erase frames with tags.
• C. VLAN tagging only works on wireless networks.
• D. VLAN tagging is used to route between networks.

Answer: (A)