Alcatel-Lucent NRS II – IP/MPLS Services — Question 43

Which of the following statements about the default scheduler in the Nokia 7750 SR is TRUE?

Answer options

• A. A queue will be serviced as expedited if all of the forwarding classes mapped to it are expedited, regardless of its configured type.
• B. A queue will be serviced as best-effort if all of the forwarding classes mapped to it are best-effort, regardless of its configured type.
• C. A queue will be serviced as expedited if at least one of the forwarding classes mapped to it is expedited, regardless of its configured type.
• D. A queue will be serviced as expedited if its type is configured as expedited, regardless of the forwarding classes mapped to it.

Correct answer: A

Explanation

The correct answer is A because the default scheduler prioritizes queues based on the forwarding classes assigned to them; if all are expedited, the queue will be treated as such. Option B is incorrect because best-effort service is not guaranteed by having all classes set to best-effort. Option C is wrong since having just one expedited class does not automatically make the entire queue expedited. Option D is also incorrect as the configuration of a queue type alone does not dictate its servicing if the forwarding classes are not aligned.