Classification and Packet Loss Priority JN0-650 Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   What is the correct way to apply a firewall filter for MF classification on an ingress interface?

   • AUse the 'filter' statement under the interface's 'unit' configuration
   • BUse the 'scheduler-map' statement under the interface's 'unit' configuration
   • CUse the 'rewrite' statement under the interface's 'unit' configuration
   • DUse the 'classifier' statement under the interface's 'unit' configuration
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2. 17application · medium

   A network engineer is configuring CoS on a Junos router. The engineer has defined a scheduler for the assured-forwarding (AF) forwarding class. The scheduler uses a drop profile that has different drop probabilities for low and high PLP. The engineer wants to ensure that packets classified with DSCP AF41 are treated as low PLP and packets with DSCP AF43 are treated as high PLP. What is the correct configuration?

   • AConfigure a BA classifier that maps DSCP AF41 to the AF forwarding class with low PLP and DSCP AF43 to the AF forwarding class with high PLP.
   • BConfigure the scheduler to use a single drop profile for all packets in the AF class, regardless of PLP.
   • CConfigure a rewrite rule that maps DSCP AF41 to low PLP and DSCP AF43 to high PLP on egress.
   • DConfigure a firewall filter that matches DSCP AF41 and sets loss-priority low, and matches DSCP AF43 and sets loss-priority high.
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4. 18foundation · easy

   How is PLP typically set for a packet in Junos CoS?

   • AIt is set by the rewrite rule on ingress
   • BIt is derived from the DSCP value on egress
   • CIt is automatically set by the scheduler based on queue depth
   • DIt is set during classification based on the classifier's configuration
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5. 19foundation · easy

   In Junos CoS, what is the primary purpose of classification?

   • ATo assign packets to forwarding classes and packet loss priorities based on packet attributes
   • BTo rewrite the DSCP or 802.1p bits on egress to match the next-hop network's expectations
   • CTo schedule packets from multiple queues onto the physical link
   • DTo shape traffic to a configured bandwidth limit on an interface
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6. 20foundation · easy

   What is a primary advantage of multifield (MF) classification over behavior aggregate (BA) classification?

   • AIt can classify packets based on multiple fields such as source and destination addresses
   • BIt automatically rewrites packet headers on egress
   • CIt does not require any configuration on interfaces
   • DIt is faster and requires less processing
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