Cisco
352-001 · Question #95
352-001 Question #95: Real Exam Question with Answer & Explanation
The correct answer is C: It requires consideration of the performance targets of classes sharing the queue.. When multiple traffic classes share a single queue, the scheduler applies one policy to all of them without distinction, requiring careful evaluation of each class's performance targets.
Question
What statement is true about designing a policy in which more than one class share a queue?
Options
- AIt must be avoided under all circumstances.
- BIt will result in a negative class.
- CIt requires consideration of the performance targets of classes sharing the queue.
- DIt should be deployed throughout the network to simplify the design.
Explanation
When multiple traffic classes share a single queue, the scheduler applies one policy to all of them without distinction, requiring careful evaluation of each class's performance targets.
Common mistakes.
- A. Sharing a queue is not unconditionally prohibited - it is an acceptable design choice when the sharing classes have compatible performance requirements.
- B. A 'negative class' is a CBWFQ concept related to bandwidth allocation oversubscription, not an automatic consequence of multiple classes sharing a queue.
- D. Deploying shared queues throughout the network solely to simplify design is not a recommended practice because it can violate per-class SLAs where traffic profiles differ.
Concept tested. QoS queue sharing and class performance design considerations
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