Alcatel-Lucent NRS II – Wide Area Network Services — Question 20

How many bits of the MPLS header are used for the label field?

Answer options

• A. 16
• B. 20
• C. 24
• D. 25
• E. 32

Correct answer: B

Explanation

The MPLS header allocates 20 bits specifically for the label field, which is essential for directing packets through an MPLS network. The other options do not represent the correct size of the label field, as 16 bits, 24 bits, 25 bits, and 32 bits do not conform to the MPLS standard.