An interface is configured with a behavior aggregate classifier and a multifield classifier How will the packet be processed when received on this interface?

An interface is configured with a behavior aggregate classifier and a multifield classifier How will the packet be processed when received on this interface?
A . The packet will be discarded.
B . The packet will be processed by the BA classifier first, then the MF classifier.
C . The packet will be forwarded with no classification changes.
D . The packet will be processed by the MF classifier first, then the BA classifier.

View Answer

Answer: D

Explanation:

In Junos, when both a behavior aggregate (BA) classifier and a multifield (MF) classifier are configured on an interface, the multifield classifier is evaluated first because it is more specific. If the packet does not match any of the multifield classifier terms, then the behavior aggregate classifier is used. The BA classifier typically classifies based on the DSCP or EXP bits, while the MF classifier can match on multiple fields in the packet header, like source and destination IP address, ports, etc.