JNCIP-SP: Juniper Networks Certified Professional – Service Provider (2023) — Question 15

Which two statements are correct about the customer interface in an LDP-signaled pseudowire? (Choose two.)

Answer options

• A. When the encapsulation is vlan-ccc or extended-vlan-ccc, the configured VLAN tag is included in the control plane LDP advertisement.
• B. When the encapsulation is ethernet-ccc, tagged and untagged frames are both accepted in the data plane.
• C. When the encapsulation is ethernet-ccc, only frames without a VLAN tag are accepted in the data plane.
• D. When the encapsulation is vlan-ccc or extended-vlan-ccc, the configured VLAN tag is not included in the control plane LDP advertisement.

Correct answer: A, B

Explanation

Option A is correct because VLAN tags are included in LDP advertisements when using vlan-ccc or extended-vlan-ccc encapsulation. Option B is also correct as both tagged and untagged frames can be accepted with ethernet-ccc. Options C and D are incorrect because C misrepresents the acceptance of frames in ethernet-ccc, and D contradicts the inclusion of VLAN tags in the LDP advertisement for vlan-ccc or extended-vlan-ccc.