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Exam Code: JN0-650

Exam Name: Enterprise Routing and Switching, Professional (JNCIP-ENT)

Certification Provider: Juniper

Corresponding Certification: JNCIP-ENT

Questions & Answers

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Juniper JN0-650 Practice Test 70

Question 690

A Junos network engineer takes this step: Tune supported scheduler buffer allocation for the affected output queue. Which outcome most directly follows?

  1. Buffered traffic can be scheduled to respect the desired output rate.
  2. Delay-sensitive packets can receive preferential transmission service within configured bounds.
  3. The engineer can distinguish scheduling or queue-drop contention from physical interface errors.
  4. The queue can absorb intended bursts within the physical and policy limits.

Explanation

Correct Answer

D:

This is the direct result of the Buffer management decision: The queue can absorb intended bursts within the physical and policy limits.

Incorrect Answers

A:

This outcome is associated with Shaper egress smoothing (Use supported egress shaping at the appropriate hierarchy and rate.), not the specified action.

B:

This outcome is associated with Strict-priority voice queue (Configure supported high-priority scheduler treatment with suitable rate controls for the voice class.), not the specified action.

C:

This outcome is associated with Queue congestion diagnosis (Inspect output queue drops, scheduler assignments and CoS statistics during congestion.), not the specified action.

Question 691

Bursty data drops even though sustained link usage is moderate because queue buffering is insufficient. A colleague instead suggests: Use supported egress shaping at the appropriate hierarchy and rate. Which corrective approach most directly addresses the original issue?

  1. Tune supported scheduler buffer allocation for the affected output queue.
  2. Configure supported high-priority scheduler treatment with suitable rate controls for the voice class.
  3. Use supported egress shaping at the appropriate hierarchy and rate.
  4. Inspect output queue drops, scheduler assignments and CoS statistics during congestion.

Explanation

Correct Answer

A:

This corrective choice addresses Buffer management. The queue can absorb intended bursts within the physical and policy limits.

Incorrect Answers

B:

That alternative applies to Strict-priority voice queue instead. Delay-sensitive packets can receive preferential transmission service within configured bounds.

C:

That alternative applies to Shaper egress smoothing instead. Buffered traffic can be scheduled to respect the desired output rate.

D:

That alternative applies to Queue congestion diagnosis instead. The engineer can distinguish scheduling or queue-drop contention from physical interface errors.

Question 692

An enterprise network designer recommends: Tune supported scheduler buffer allocation for the affected output queue. Which situation most clearly calls for this action?

  1. An uplink is physically error-free, but video quality drops whenever a bulk file transfer begins.
  2. Bursty data drops even though sustained link usage is moderate because queue buffering is insufficient.
  3. Traffic exits a router toward a slower contracted circuit and bursts must be smoothed before reaching that circuit.
  4. Voice packets must have low queuing delay relative to best-effort traffic during link congestion.

Explanation

Correct Answer

B:

This case requires the Buffer management action. The queue can absorb intended bursts within the physical and policy limits.

Incorrect Answers

A:

This other case would be better matched to Inspect output queue drops, scheduler assignments and CoS statistics during congestion. The engineer can distinguish scheduling or queue-drop contention from physical interface errors.

C:

This other case would be better matched to Use supported egress shaping at the appropriate hierarchy and rate. Buffered traffic can be scheduled to respect the desired output rate.

D:

This other case would be better matched to Configure supported high-priority scheduler treatment with suitable rate controls for the voice class. Delay-sensitive packets can receive preferential transmission service within configured bounds.

Question 693

A customer-facing ingress port sends traffic well above an agreed rate and must be limited rather than buffered indefinitely. Which Junos networking action or protocol decision best addresses this requirement?

  1. Use egress shaping when buffering and pacing is required, and policing for excess-rate enforcement.
  2. Configure a CoS scheduler transmit-rate allocation for the relevant forwarding class.
  3. Apply an appropriate Junos traffic policer with defined rate and burst bounds.
  4. Apply the scheduler map to the intended egress interface.

Explanation

Correct Answer

C:

This action addresses Policer excess-rate control. Traffic exceeding the committed allowance can be dropped or treated as configured.

Incorrect Answers

A:

That action targets Policing versus shaping: The design differentiates packet delaying from packet discarding or marking. It does not directly resolve the stated Policer excess-rate control requirement.

B:

That action targets Scheduler transmit rate: The assigned queue has a defined share of available transmission service. It does not directly resolve the stated Policer excess-rate control requirement.

D:

That action targets Scheduler map attachment: The interface queues can use the configured class-to-scheduler assignment. It does not directly resolve the stated Policer excess-rate control requirement.

Question 694

A Junos network engineer takes this step: Apply an appropriate Junos traffic policer with defined rate and burst bounds. Which outcome most directly follows?

  1. The interface queues can use the configured class-to-scheduler assignment.
  2. The assigned queue has a defined share of available transmission service.
  3. The design differentiates packet delaying from packet discarding or marking.
  4. Traffic exceeding the committed allowance can be dropped or treated as configured.

Explanation

Correct Answer

D:

This is the direct result of the Policer excess-rate control decision: Traffic exceeding the committed allowance can be dropped or treated as configured.

Incorrect Answers

A:

This outcome is associated with Scheduler map attachment (Apply the scheduler map to the intended egress interface.), not the specified action.

B:

This outcome is associated with Scheduler transmit rate (Configure a CoS scheduler transmit-rate allocation for the relevant forwarding class.), not the specified action.

C:

This outcome is associated with Policing versus shaping (Use egress shaping when buffering and pacing is required, and policing for excess-rate enforcement.), not the specified action.

Question 695

A customer-facing ingress port sends traffic well above an agreed rate and must be limited rather than buffered indefinitely. A colleague instead suggests: Apply the scheduler map to the intended egress interface. Which corrective approach most directly addresses the original issue?

  1. Apply an appropriate Junos traffic policer with defined rate and burst bounds.
  2. Configure a CoS scheduler transmit-rate allocation for the relevant forwarding class.
  3. Use egress shaping when buffering and pacing is required, and policing for excess-rate enforcement.
  4. Apply the scheduler map to the intended egress interface.

Explanation

Correct Answer

A:

This corrective choice addresses Policer excess-rate control. Traffic exceeding the committed allowance can be dropped or treated as configured.

Incorrect Answers

B:

That alternative applies to Scheduler transmit rate instead. The assigned queue has a defined share of available transmission service.

C:

That alternative applies to Policing versus shaping instead. The design differentiates packet delaying from packet discarding or marking.

D:

That alternative applies to Scheduler map attachment instead. The interface queues can use the configured class-to-scheduler assignment.

Question 696

An enterprise network designer recommends: Apply an appropriate Junos traffic policer with defined rate and burst bounds. Which situation most clearly calls for this action?

  1. A CoS scheduler map has correct priorities but the production egress port continues using default queue scheduling.
  2. A customer-facing ingress port sends traffic well above an agreed rate and must be limited rather than buffered indefinitely.
  3. A network manager expects an ingress policer to hold excess packets in a queue for later forwarding.
  4. A link should reserve a predictable fraction of output service for a business-critical application during contention.

Explanation

Correct Answer

B:

This case requires the Policer excess-rate control action. Traffic exceeding the committed allowance can be dropped or treated as configured.

Incorrect Answers

A:

This other case would be better matched to Apply the scheduler map to the intended egress interface. The interface queues can use the configured class-to-scheduler assignment.

C:

This other case would be better matched to Use egress shaping when buffering and pacing is required, and policing for excess-rate enforcement. The design differentiates packet delaying from packet discarding or marking.

D:

This other case would be better matched to Configure a CoS scheduler transmit-rate allocation for the relevant forwarding class. The assigned queue has a defined share of available transmission service.

Question 697

Traffic exits a router toward a slower contracted circuit and bursts must be smoothed before reaching that circuit. Which Junos networking action or protocol decision best addresses this requirement?

  1. Use supported egress shaping at the appropriate hierarchy and rate.
  2. Tune supported scheduler buffer allocation for the affected output queue.
  3. Inspect output queue drops, scheduler assignments and CoS statistics during congestion.
  4. Configure supported high-priority scheduler treatment with suitable rate controls for the voice class.

Explanation

Correct Answer

A:

This action addresses Shaper egress smoothing. Buffered traffic can be scheduled to respect the desired output rate.

Incorrect Answers

B:

That action targets Buffer management: The queue can absorb intended bursts within the physical and policy limits. It does not directly resolve the stated Shaper egress smoothing requirement.

C:

That action targets Queue congestion diagnosis: The engineer can distinguish scheduling or queue-drop contention from physical interface errors. It does not directly resolve the stated Shaper egress smoothing requirement.

D:

That action targets Strict-priority voice queue: Delay-sensitive packets can receive preferential transmission service within configured bounds. It does not directly resolve the stated Shaper egress smoothing requirement.

Question 698

A Junos network engineer takes this step: Use supported egress shaping at the appropriate hierarchy and rate. Which outcome most directly follows?

  1. The engineer can distinguish scheduling or queue-drop contention from physical interface errors.
  2. Buffered traffic can be scheduled to respect the desired output rate.
  3. The queue can absorb intended bursts within the physical and policy limits.
  4. Delay-sensitive packets can receive preferential transmission service within configured bounds.

Explanation

Correct Answer

B:

This is the direct result of the Shaper egress smoothing decision: Buffered traffic can be scheduled to respect the desired output rate.

Incorrect Answers

A:

This outcome is associated with Queue congestion diagnosis (Inspect output queue drops, scheduler assignments and CoS statistics during congestion.), not the specified action.

C:

This outcome is associated with Buffer management (Tune supported scheduler buffer allocation for the affected output queue.), not the specified action.

D:

This outcome is associated with Strict-priority voice queue (Configure supported high-priority scheduler treatment with suitable rate controls for the voice class.), not the specified action.

Question 699

Traffic exits a router toward a slower contracted circuit and bursts must be smoothed before reaching that circuit. A colleague instead suggests: Inspect output queue drops, scheduler assignments and CoS statistics during congestion. Which corrective approach most directly addresses the original issue?

  1. Inspect output queue drops, scheduler assignments and CoS statistics during congestion.
  2. Tune supported scheduler buffer allocation for the affected output queue.
  3. Use supported egress shaping at the appropriate hierarchy and rate.
  4. Configure supported high-priority scheduler treatment with suitable rate controls for the voice class.

Explanation

Correct Answer

C:

This corrective choice addresses Shaper egress smoothing. Buffered traffic can be scheduled to respect the desired output rate.

Incorrect Answers

A:

That alternative applies to Queue congestion diagnosis instead. The engineer can distinguish scheduling or queue-drop contention from physical interface errors.

B:

That alternative applies to Buffer management instead. The queue can absorb intended bursts within the physical and policy limits.

D:

That alternative applies to Strict-priority voice queue instead. Delay-sensitive packets can receive preferential transmission service within configured bounds.

Question 700

An enterprise network designer recommends: Use supported egress shaping at the appropriate hierarchy and rate. Which situation most clearly calls for this action?

  1. Bursty data drops even though sustained link usage is moderate because queue buffering is insufficient.
  2. Voice packets must have low queuing delay relative to best-effort traffic during link congestion.
  3. An uplink is physically error-free, but video quality drops whenever a bulk file transfer begins.
  4. Traffic exits a router toward a slower contracted circuit and bursts must be smoothed before reaching that circuit.

Explanation

Correct Answer

D:

This case requires the Shaper egress smoothing action. Buffered traffic can be scheduled to respect the desired output rate.

Incorrect Answers

A:

This other case would be better matched to Tune supported scheduler buffer allocation for the affected output queue. The queue can absorb intended bursts within the physical and policy limits.

B:

This other case would be better matched to Configure supported high-priority scheduler treatment with suitable rate controls for the voice class. Delay-sensitive packets can receive preferential transmission service within configured bounds.

C:

This other case would be better matched to Inspect output queue drops, scheduler assignments and CoS statistics during congestion. The engineer can distinguish scheduling or queue-drop contention from physical interface errors.

Enterprise Routing and Switching, Professional (JNCIP-ENT) (JN0-650) Practice Tests