A Packet Is to Be Encapsulated Inside an MPLS Tunnel

question 183

Multiple Choice

A packet is to be encapsulated inside an MPLS tunnel which consists of two MPLS headers at the first network egress. Which of the MPLS EXP fields will be marked?

• A) The EXP field in the bottom MPLS header will be marked.
• B) The EXP field in both the top and bottom MPLS headers will be marked.
• C) For Layer 2 services, the top MPLS header will be marked; for Layer 3 services, the bottom MPLS header will be marked.
• D) The EXP field in the top MPLS header will be marked.
• E) Neither the top nor the bottom EXP field will be marked since EXP remarking can only be done on the network ingress.

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