Nokia Certified Network Associate – SR OS Network Administration — Question 19

A network port using null encapsulation has an MTU of 1514 bytes. When MPLS transport is used without FRR, what is the maximum service MTU of a VPLS using that port?

Answer options

• A. 1536
• B. 1514
• C. 1496
• D. 1492
• E. 1488

Correct answer: B

Explanation

The correct answer is B, 1514, because the service MTU cannot exceed the MTU of the underlying port when no additional encapsulation is applied. Options A, C, D, and E suggest MTUs greater or lower than 1514, which would not be feasible given the constraints of the null encapsulation and MPLS transport.