Packet Loss Priority JN0-664 Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   In a Junos rewrite rule, what information is used to set the CoS bits of an outgoing packet?

   • AThe packet's DSCP value and the queue depth
   • BThe source and destination IP addresses
   • CThe scheduler's priority and shaping rate
   • DThe forwarding class and PLP assigned to the packet
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2. 12foundation · easy

   Which statement correctly describes the relationship between packet loss priority (PLP) and forwarding class in Junos CoS?

   • APLP is a per-queue attribute that overrides the forwarding class.
   • BPLP is an independent attribute that works with the forwarding class to determine drop behavior.
   • CPLP is only relevant for packets that have no forwarding class assigned.
   • DPLP and forwarding class are the same attribute and are set together.
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4. 13application · medium

   A network engineer is configuring CoS on a router that connects to a service provider network. The provider requires that all traffic sent to it be marked with a specific DSCP value that includes the PLP. The engineer has already classified the traffic into forwarding classes. What should the engineer configure to ensure the outgoing packets have the correct DSCP marking?

   • AConfigure a drop profile that sets the DSCP value based on PLP.
   • BApply a rewrite rule on the egress interface that maps each forwarding class and PLP to the required DSCP value.
   • CApply a BA classifier on the egress interface to set the DSCP value.
   • DUse a firewall filter to set the DSCP value based on the source IP.
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5. 14application · medium

   A network engineer is tuning CoS on a router that experiences occasional congestion on a critical link. They want to ensure that during congestion, packets with a high PLP are dropped before packets with a low PLP in the same forwarding class. What should the engineer configure?

   • AConfigure a rewrite rule that sets the PLP of all packets to low.
   • BCreate a drop profile that has a higher drop probability for high-PLP packets than for low-PLP packets.
   • CAssign a higher scheduler priority to the low-PLP queue.
   • DEnable weighted random early detection (WRED) on the queue without specifying PLP.
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6. 15foundation · easy

   In Junos CoS, what is the primary role of packet loss priority (PLP)?

   • ATo specify the output queue a packet should use
   • BTo indicate the relative drop preference of a packet during congestion
   • CTo define the scheduling priority of a packet
   • DTo determine the forwarding class of a packet
   Reveal Solution Discussion Select an answer first