Packet Loss Priority JN0-664 Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   A service provider is experiencing congestion on a link and wants to ensure that low-PLP traffic is not dropped before high-PLP traffic in the same queue. They have configured a drop profile that drops packets based on queue fill level. What additional configuration is needed to make the drop profile PLP-aware?

   • AEnable weighted random early detection (WRED) on the queue.
   • BApply a rewrite rule that sets the PLP of all packets to low.
   • CAssign different scheduler priorities to low-PLP and high-PLP traffic.
   • DConfigure the drop profile to have separate drop curves for low-PLP and high-PLP packets.
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2. 7expert · hard

   A network engineer is troubleshooting packet loss on a congested link. The CoS configuration uses a drop profile that is supposed to drop high-PLP packets more aggressively than low-PLP packets. However, during congestion, the engineer observes that low-PLP packets are being dropped at a higher rate than expected. What could be the cause?

   • AThe rewrite rule is setting the PLP of low-PLP packets to high.
   • BThe drop profile is applied to the wrong scheduler.
   • CThe classifier is setting all packets to low PLP, so the drop profile treats them equally.
   • DThe drop profile has a steeper curve for low-PLP packets than for high-PLP packets.
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4. 8application · medium

   A network architect is explaining CoS to a junior engineer. The architect states that packet loss priority (PLP) is used to differentiate packets within a forwarding class. What is the primary purpose of this differentiation?

   • ATo determine the forwarding class of the packet.
   • BTo enable the router to drop high-PLP packets before low-PLP packets during congestion.
   • CTo allow the scheduler to prioritize low-PLP packets over high-PLP packets.
   • DTo set the DSCP value in the outgoing packet header.
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5. 9application · medium

   A service provider is configuring CoS on a router to manage congestion on a link. They want to ensure that when the queue is 80% full, high-PLP packets are dropped with a probability of 50%, while low-PLP packets are dropped with a probability of 10%. What should the administrator configure?

   • AA scheduler with a higher priority for low-PLP packets.
   • BA drop profile with two fill levels, one for low PLP and one for high PLP, each with the specified drop probabilities.
   • CA rewrite rule that sets the PLP of high-PLP packets to low.
   • DA policer that drops high-PLP packets at a rate of 50%.
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6. 10foundation · easy

   What is the purpose of configuring separate drop curves for high and low PLP in a single drop profile?

   • ATo allow different forwarding classes to use different drop profiles.
   • BTo make the drop decision based on the packet's DSCP value.
   • CTo give low PLP packets a lower drop probability than high PLP packets at the same queue depth.
   • DTo ensure that high PLP packets are never dropped.
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