JNCIS-ENT: Juniper Networks Certified Specialist – Enterprise Routing and Switching (2024) — Question 68

Which statement is correct about trunk ports?

Answer options

• A. Trunk ports must have an IRB assigned to accept VLAN tagged traffic.
• B. By default, trunk ports accept only VLAN tagged traffic.
• C. By default, a trunk port can have only a single VLAN assigned.
• D. trunk ports must have an IRB assigned to accept untagged traffic.

Correct answer: B

Explanation

The correct answer is B because trunk ports are designed to carry multiple VLANs and, by default, they only accept traffic that is tagged with VLAN information. Option A is incorrect as trunk ports do not require an IRB for VLAN tagged traffic. Option C is wrong because trunk ports can support multiple VLANs, and option D is incorrect since untagged traffic is typically handled by access ports, not trunk ports.