Policers, Schedulers, and Drop Profiles JN0-650 Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   Which action is NOT a valid explicit action that can be configured for a policer in a Junos firewall filter?

   • Atransmit
   • Bnext-term
   • Cdiscard
   • Dforwarding-class
   Reveal Solution Discussion Select an answer first
2. 2foundation · easy

   In a Junos CoS architecture, what is the correct order of operations for traffic entering an interface?

   • AScheduling -> Classification -> Policing -> Queuing
   • BPolicing -> Classification -> Scheduling -> Queuing
   • CClassification -> Policing -> Queuing -> Scheduling
   • DClassification -> Policing -> Scheduling -> Drop profile
   Reveal Solution Discussion Select an answer first
4. 3foundation · easy

   How do policers and drop profiles interact to manage traffic in a Junos CoS implementation?

   • APolicers and drop profiles both discard traffic at the same point in the pipeline.
   • BPolicers shape traffic to a rate, while drop profiles prioritize traffic.
   • CPolicers mark traffic with loss priority, while drop profiles ignore loss priority.
   • DPolicers discard traffic before it enters the queue, while drop profiles discard traffic after it enters the queue.
   Reveal Solution Discussion Select an answer first
5. 4foundation · easy

   What is the role of RED (Random Early Detection) in Junos CoS?

   • AIt prevents congestion by shaping traffic to a configured rate.
   • BIt drops packets randomly as the queue fills to signal congestion before the queue is full.
   • CIt guarantees bandwidth for high-priority queues.
   • DIt prioritizes packets based on their DSCP value.
   Reveal Solution Discussion Select an answer first
6. 5foundation · easy

   What is the default drop profile behavior if no drop profile is explicitly associated with a scheduler?

   • AThe queue uses a default RED profile with a 50% drop probability at 100% fill.
   • BAll packets are dropped when the queue is full.
   • CThe queue drops all packets regardless of fill level.
   • DThe queue uses tail-drop, where packets are dropped only when the queue is full.
   Reveal Solution Discussion Select an answer first