How many queues are available for use on service egress within a VPLS service?

Question

Options

• A1 multipoint and 8 unicast.
• B8 queues, regardless of traffic type.
• C8 unicast and 24 multipoint.
• D8 unicast and 8 multipoint.
• E16 queues, distributed as desired.

• A
  7% (1)
• B
  86% (12)
• C
  7% (1)

Explanation

On service egress within a VPLS service, exactly 8 queues are available, and they serve all traffic types without distinction - unicast and multipoint (BUM: Broadcast, Unknown unicast, Multicast) traffic share the same egress queue structure rather than receiving separate allocations. Options A, C, and D are incorrect because they falsely imply that egress queues are partitioned between unicast and multipoint traffic (e.g., "8 unicast + 8 multipoint" would imply 16 total, which doesn't reflect the actual architecture). Option E is wrong because the total is fixed at 8, not 16, and cannot be arbitrarily distributed. A useful memory tip: "VPLS egress is 8 and done" - unlike ingress, where traffic classification can differentiate unicast from multipoint, egress keeps it simple with a single flat pool of 8 queues for everything.

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