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Exam Code: JN0-650

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

Certification Provider: Juniper

Corresponding Certification: JNCIP-ENT

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Juniper JN0-650 Practice Test 71

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.

Question 701

A CoS scheduler map has correct priorities but the production egress port continues using default queue scheduling. Which Junos networking action or protocol decision best addresses this requirement?

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

Explanation

Correct Answer

A:

This action addresses Scheduler map attachment. The interface queues can use the configured class-to-scheduler assignment.

Incorrect Answers

B:

That action targets Policer excess-rate control: Traffic exceeding the committed allowance can be dropped or treated as configured. It does not directly resolve the stated Scheduler map attachment requirement.

C:

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

D:

That action targets Policing versus shaping: The design differentiates packet delaying from packet discarding or marking. It does not directly resolve the stated Scheduler map attachment requirement.

Question 702

A Junos network engineer takes this step: Apply the scheduler map to the intended egress interface. Which outcome most directly follows?

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

Explanation

Correct Answer

B:

This is the direct result of the Scheduler map attachment decision: The interface queues can use the configured class-to-scheduler assignment.

Incorrect Answers

A:

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.

C:

This outcome is associated with Policer excess-rate control (Apply an appropriate Junos traffic policer with defined rate and burst bounds.), not the specified action.

D:

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

Question 703

A CoS scheduler map has correct priorities but the production egress port continues using default queue scheduling. A colleague instead suggests: Use egress shaping when buffering and pacing is required, and policing for excess-rate enforcement. Which corrective approach most directly addresses the original issue?

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

Explanation

Correct Answer

C:

This corrective choice addresses Scheduler map attachment. The interface queues can use the configured class-to-scheduler assignment.

Incorrect Answers

A:

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

B:

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

D:

That alternative applies to Policer excess-rate control instead. Traffic exceeding the committed allowance can be dropped or treated as configured.

Question 704

An enterprise network designer recommends: Apply the scheduler map to the intended egress interface. Which situation most clearly calls for this action?

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

Explanation

Correct Answer

D:

This case requires the Scheduler map attachment action. The interface queues can use the configured class-to-scheduler assignment.

Incorrect Answers

A:

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.

B:

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.

C:

This other case would be better matched to Apply an appropriate Junos traffic policer with defined rate and burst bounds. Traffic exceeding the committed allowance can be dropped or treated as configured.

Question 705

An uplink is physically error-free, but video quality drops whenever a bulk file transfer begins. Which Junos networking action or protocol decision best addresses this requirement?

  1. Tune supported scheduler buffer allocation for the affected output queue.
  2. Use supported egress shaping at the appropriate hierarchy and rate.
  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

C:

This action addresses Queue congestion diagnosis. The engineer can distinguish scheduling or queue-drop contention from physical interface errors.

Incorrect Answers

A:

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

B:

That action targets Shaper egress smoothing: Buffered traffic can be scheduled to respect the desired output rate. It does not directly resolve the stated Queue congestion diagnosis 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 Queue congestion diagnosis requirement.

Question 706

A Junos network engineer takes this step: Inspect output queue drops, scheduler assignments and CoS statistics during congestion. Which outcome most directly follows?

  1. Delay-sensitive packets can receive preferential transmission service within configured bounds.
  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. The engineer can distinguish scheduling or queue-drop contention from physical interface errors.

Explanation

Correct Answer

D:

This is the direct result of the Queue congestion diagnosis decision: The engineer can distinguish scheduling or queue-drop contention from physical interface errors.

Incorrect Answers

A:

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.

B:

This outcome is associated with Shaper egress smoothing (Use supported egress shaping at the appropriate hierarchy and rate.), 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.

Question 707

An uplink is physically error-free, but video quality drops whenever a bulk file transfer begins. A colleague instead suggests: Configure supported high-priority scheduler treatment with suitable rate controls for the voice class. Which corrective approach most directly addresses the original issue?

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

Explanation

Correct Answer

A:

This corrective choice addresses Queue congestion diagnosis. The engineer can distinguish scheduling or queue-drop contention from physical interface errors.

Incorrect Answers

B:

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

C:

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 708

An enterprise network designer recommends: Inspect output queue drops, scheduler assignments and CoS statistics during congestion. Which situation most clearly calls for this action?

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

Explanation

Correct Answer

B:

This case requires the Queue congestion diagnosis action. The engineer can distinguish scheduling or queue-drop contention from physical interface errors.

Incorrect Answers

A:

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 Tune supported scheduler buffer allocation for the affected output queue. The queue can absorb intended bursts within the physical and policy limits.

D:

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.

Question 709

A network manager expects an ingress policer to hold excess packets in a queue for later forwarding. Which Junos networking action or protocol decision best addresses this requirement?

  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. Apply the scheduler map to the intended egress interface.
  4. Use egress shaping when buffering and pacing is required, and policing for excess-rate enforcement.

Explanation

Correct Answer

D:

This action addresses Policing versus shaping. The design differentiates packet delaying from packet discarding or marking.

Incorrect Answers

A:

That action targets Policer excess-rate control: Traffic exceeding the committed allowance can be dropped or treated as configured. It does not directly resolve the stated Policing versus shaping 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 Policing versus shaping requirement.

C:

That action targets Scheduler map attachment: The interface queues can use the configured class-to-scheduler assignment. It does not directly resolve the stated Policing versus shaping requirement.

Question 710

A Junos network engineer takes this step: Use egress shaping when buffering and pacing is required, and policing for excess-rate enforcement. Which outcome most directly follows?

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

Explanation

Correct Answer

A:

This is the direct result of the Policing versus shaping decision: The design differentiates packet delaying from packet discarding or marking.

Incorrect Answers

B:

This outcome is associated with Policer excess-rate control (Apply an appropriate Junos traffic policer with defined rate and burst bounds.), not the specified action.

C:

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

D:

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

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