Question 680
An enterprise network designer recommends: Differentiate forwarding class from packet-loss priority in Junos CoS policy. Which situation most clearly calls for this action?
Explanation
Correct Answer
This case requires the CoS packet-loss priority action. Service queue assignment and relative drop precedence can be controlled independently.
Incorrect Answers
This other case would be better matched to Use a supported firewall-filter multifield classifier with forwarding-class action. Packets can be classified using header match fields rather than trusting DSCP alone.
This other case would be better matched to Assign the less critical packets a higher loss priority in classification. Congestion drop policy can distinguish the relative discard preference within a queue.
This other case would be better matched to Reclassify or remark untrusted ingress traffic according to a controlled classification policy. Untrusted endpoint markings do not automatically obtain privileged forwarding treatment.