JN0-102 · Question #316
Referring to the exhibit, which type of classifier is being used in this CoS configuration? [edit class-of-service] user@router# show interfaces { ge-0/0/2 { unit 0 { classifiers { inet-precedence…
The correct answer is A. behavior aggregate. The CoS configuration uses inet-precedence as a classifier, which means it evaluates a single field (IP Precedence in the Type of Service byte) in the IP header to classify traffic, characteristic of a behavior aggregate classifier.
Question
Referring to the exhibit, which type of classifier is being used in this CoS configuration? [edit class-of-service] user@router# show interfaces { ge-0/0/2 { unit 0 { classifiers { inet-precedence default; } } } }
Options
- Abehavior aggregate
- Bpolicer
- Cmultifield
- Dforwarding policy
How the community answered
(41 responses)- A88% (36)
- B2% (1)
- C2% (1)
- D7% (3)
Why each option
The CoS configuration uses `inet-precedence` as a classifier, which means it evaluates a single field (IP Precedence in the Type of Service byte) in the IP header to classify traffic, characteristic of a behavior aggregate classifier.
A behavior aggregate (BA) classifier categorizes traffic into forwarding classes based on a single field in the packet header, such as `inet-precedence` (IP Precedence bits) or DSCP. The configuration explicitly uses `inet-precedence` for classification, indicating a BA classifier.
A policer is used for rate-limiting traffic, not for classifying it based on header fields.
A multifield classifier examines multiple fields in the packet header for classification, whereas `inet-precedence` refers to a single field (IP precedence).
Forwarding policy typically refers to routing policies, which are distinct from Class of Service classification mechanisms.
Concept tested: Class of Service - Behavior Aggregate Classifier
Source: https://www.juniper.net/documentation/us/en/software/junos/cos/topics/concept/cos-classifiers-overview.html
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