ICND2: Interconnecting Cisco Networking Devices Part 2 (legacy) — Question 98

Which three of these statements regarding 802.1Q trunking are correct? (Choose three.)

Answer options

• A. 802.1Q native VLAN frames are untagged by default.
• B. 802.1Q trunking ports can also be secure ports.
• C. 802.1Q trunks can use 10 Mb/s Ethernet interfaces.
• D. 802.1Q trunks require full-duplex, point-to-point connectivity.
• E. 802.1Q trunks should have native VLANs that are the same at both ends.

Correct answer: A, C, E

Explanation

Answer A is correct because 802.1Q native VLAN frames do not contain VLAN tags by default. Answer C is also correct as 802.1Q can operate over 10 Mb/s Ethernet interfaces, and answer E is valid since matching native VLANs at both ends of the trunk is important for proper communication. Answers B and D are incorrect because 802.1Q trunking ports are not necessarily secure ports, and while full-duplex is recommended, it is not a strict requirement for trunking.