4A0-107 · Question #50
On the Alcatel-Lucent 7750 SR, what is the maximum number of queues that a single SAP- ingress policy can support in a VPLS?
The correct answer is C. 32. On the Alcatel-Lucent 7750 SR, a single SAP-ingress policy supports a maximum of 32 queues in a VPLS context, making C correct. This limit is defined by the platform's QoS architecture, which allocates queue resources per SAP to balance granular traffic classification with…
Question
On the Alcatel-Lucent 7750 SR, what is the maximum number of queues that a single SAP- ingress policy can support in a VPLS?
Options
- A16
- B8
- C32
- D48
- E56
How the community answered
(26 responses)- B8% (2)
- C88% (23)
- E4% (1)
Explanation
On the Alcatel-Lucent 7750 SR, a single SAP-ingress policy supports a maximum of 32 queues in a VPLS context, making C correct. This limit is defined by the platform's QoS architecture, which allocates queue resources per SAP to balance granular traffic classification with hardware scalability.
Why the distractors are wrong:
- A (16) and B (8) are too low - these may reflect queue limits in other, more constrained contexts or older platforms, not the SAP-ingress maximum for VPLS.
- D (48) and E (56) exceed the defined limit and are plausible-sounding but incorrect values likely included to test whether you've memorized the exact ceiling.
Memory tip: Think "32 = 5 bits" - the 7750 SR uses a 5-bit queue ID space (2⁵ = 32) for SAP-ingress in VPLS, which gives you a clean power-of-two anchor to recall the limit accurately under exam pressure.
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