Alcatel-Lucent NRS II – IP/MPLS Services — Question 20

Which of the following statements about the bandwidth allocation criteria used by an egress port scheduler is TRUE?

Answer options

• A. The available bandwidth of the port is divided in a strict priority over its children.
• B. Expedited queues must be serviced before best-effort queues.
• C. Orphaned queues are serviced on the 8th scheduling priority.
• D. The configured CIR dictates the maximum port bandwidth that can be allocated during the within-CIR pass for that level.

Correct answer: B

Explanation

The correct answer is B because expedited queues are designed to be prioritized over best-effort queues to ensure timely delivery of critical traffic. Option A is incorrect as it suggests a strict priority allocation which is not applicable in all cases. Option C is false as orphaned queues do not have a specific priority level in standard scheduling. Option D misrepresents the role of CIR, which does not dictate maximum bandwidth allocation but rather defines the committed rate.