Packets traverse a Junos device configured for class of service.
Which two statements are true in this scenario? (Choose two.)

A.
Packets are subject to traffic shapers before policers.

B.
Packets are subject to policers before traffic shapers.

C.
Packets are processed by behavior aggregate classifiers before multifield classifiers.

D.
Packets are processed by multifield classifier before behavior aggregate classifiers.

Explanation:
A: Traffic shaping and policing can work in tandem. For example, a good traffic shaping scheme should make it
easy for nodes inside the network to detect misbehaving flows. This activity is sometimes called policing the
traffic of the flow.
C: The simplest way to classify a packet is to use behavior aggregate (BA) classification.
For a specified interface, you can configure both a multifield classifier and a BA classifier without conflicts.
Because the classifiers are always applied in sequential order, the BA classifier followed by the multifield
classifier, any BA classification result is overridden by a multifield classifier if they conflict.
http://www.juniper.net/techpubs/en_US/junos15.1/topics/concept/classifier-ba-overview-cosconfig-guide.html