Alcatel-Lucent NRS II – Wide Area Network Services — Question 4

What is the common usage of the MPLS EXP bits?

Answer options

• A. Each implementation can use them as they see fit.
• B. They are used to carry the Ethertype value.
• C. They are used to carry the TTL value.
• D. They are used to carry QoS classification.
• E. They are used to carry fragmentation flag information

Correct answer: D

Explanation

The correct answer is D because the MPLS EXP bits are specifically designed for Quality of Service (QoS) classification. Options A, B, C, and E are incorrect as they refer to other functionalities that do not align with the primary purpose of the EXP bits in MPLS.