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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 61

Question 600

An enterprise network designer recommends: Choose an explicit deny action for the supported server-fail fallback behavior. Which situation most clearly calls for this action?

  1. An EAP-capable user responds but supplies incorrect credentials and should be quarantined rather than treated as a guest.
  2. A high-security port must deny all new sessions whenever RADIUS authorization cannot be obtained.
  3. A visitor's device sends no 802.1X EAP responses, no MAC RADIUS path is configured, and policy allows only isolated internet access.
  4. An otherwise valid access user loses authentication when the only RADIUS server becomes unreachable during an outage.

Explanation

Correct Answer

B:

This case requires the Server failure deny action. A backend outage does not automatically grant sensitive network access.

Incorrect Answers

A:

This other case would be better matched to Use the supported server-reject VLAN policy for failed responsive authentications. Rejected credentials can cause restricted access distinct from silent guest VLAN behavior.

C:

This other case would be better matched to Assign the nonresponsive eligible client to a restricted guest VLAN under the supported access policy. A non-supplicant can receive limited network service without full corporate access.

D:

This other case would be better matched to Set a deliberate server-fail fallback policy such as a restricted server-fail VLAN where supported. Authentication-server outages produce a defined access decision rather than unpredictable open access.

Question 601

A switch with many access points and desk phones reports insufficient available PoE power when another phone starts. Which Junos networking action or protocol decision best addresses this requirement?

  1. Inspect Junos PoE port power consumption, allocation and fault status.
  2. Provide supported PoE power from a capable switch port or an approved injector.
  3. Calculate the aggregate power demand against the available switch or module PoE budget.
  4. Enable the appropriate power-over-Ethernet function on the supported access port.

Explanation

Correct Answer

C:

This action addresses PoE switch budget. The design can identify whether the hardware has capacity for the full set of powered devices.

Incorrect Answers

A:

That action targets PoE monitoring: Power budget or fault evidence can distinguish electrical delivery problems from voice signaling faults. It does not directly resolve the stated PoE switch budget requirement.

B:

That action targets PoE electrical power: The endpoint can receive both network connectivity and electrical power through the Ethernet path. It does not directly resolve the stated PoE switch budget requirement.

D:

That action targets PoE port disabled: The port can supply power to a connected compatible powered device. It does not directly resolve the stated PoE switch budget requirement.

Question 602

A Junos network engineer takes this step: Calculate the aggregate power demand against the available switch or module PoE budget. Which outcome most directly follows?

  1. The endpoint can receive both network connectivity and electrical power through the Ethernet path.
  2. The port can supply power to a connected compatible powered device.
  3. Power budget or fault evidence can distinguish electrical delivery problems from voice signaling faults.
  4. The design can identify whether the hardware has capacity for the full set of powered devices.

Explanation

Correct Answer

D:

This is the direct result of the PoE switch budget decision: The design can identify whether the hardware has capacity for the full set of powered devices.

Incorrect Answers

A:

This outcome is associated with PoE electrical power (Provide supported PoE power from a capable switch port or an approved injector.), not the specified action.

B:

This outcome is associated with PoE port disabled (Enable the appropriate power-over-Ethernet function on the supported access port.), not the specified action.

C:

This outcome is associated with PoE monitoring (Inspect Junos PoE port power consumption, allocation and fault status.), not the specified action.

Question 603

A switch with many access points and desk phones reports insufficient available PoE power when another phone starts. A colleague instead suggests: Provide supported PoE power from a capable switch port or an approved injector. Which corrective approach most directly addresses the original issue?

  1. Calculate the aggregate power demand against the available switch or module PoE budget.
  2. Enable the appropriate power-over-Ethernet function on the supported access port.
  3. Inspect Junos PoE port power consumption, allocation and fault status.
  4. Provide supported PoE power from a capable switch port or an approved injector.

Explanation

Correct Answer

A:

This corrective choice addresses PoE switch budget. The design can identify whether the hardware has capacity for the full set of powered devices.

Incorrect Answers

B:

That alternative applies to PoE port disabled instead. The port can supply power to a connected compatible powered device.

C:

That alternative applies to PoE monitoring instead. Power budget or fault evidence can distinguish electrical delivery problems from voice signaling faults.

D:

That alternative applies to PoE electrical power instead. The endpoint can receive both network connectivity and electrical power through the Ethernet path.

Question 604

An enterprise network designer recommends: Calculate the aggregate power demand against the available switch or module PoE budget. Which situation most clearly calls for this action?

  1. A newly installed desk phone has an Ethernet data link but cannot start because its power adapter is missing.
  2. A switch with many access points and desk phones reports insufficient available PoE power when another phone starts.
  3. The help desk cannot explain why a PoE phone reboots during peak power usage on a full switch.
  4. A phone works on another switch interface but the target port reports its PoE delivery as administratively off.

Explanation

Correct Answer

B:

This case requires the PoE switch budget action. The design can identify whether the hardware has capacity for the full set of powered devices.

Incorrect Answers

A:

This other case would be better matched to Provide supported PoE power from a capable switch port or an approved injector. The endpoint can receive both network connectivity and electrical power through the Ethernet path.

C:

This other case would be better matched to Inspect Junos PoE port power consumption, allocation and fault status. Power budget or fault evidence can distinguish electrical delivery problems from voice signaling faults.

D:

This other case would be better matched to Enable the appropriate power-over-Ethernet function on the supported access port. The port can supply power to a connected compatible powered device.

Question 605

An IP phone requests a higher power allocation than the port's configured or supported class permits. Which Junos networking action or protocol decision best addresses this requirement?

  1. Enable the appropriate power-over-Ethernet function on the supported access port.
  2. Reassess device-by-device PoE requirements before choosing switch hardware and power supplies.
  3. Align the port's power allocation and supported PoE class with the phone's requirement.
  4. Inspect Junos PoE port power consumption, allocation and fault status.

Explanation

Correct Answer

C:

This action addresses PoE class negotiation. The powered device can negotiate the level of electrical power it needs within switch limits.

Incorrect Answers

A:

That action targets PoE port disabled: The port can supply power to a connected compatible powered device. It does not directly resolve the stated PoE class negotiation requirement.

B:

That action targets PoE capacity planning: The upgraded switch capacity can be sized to meet worst-case supported device demand. It does not directly resolve the stated PoE class negotiation requirement.

D:

That action targets PoE monitoring: Power budget or fault evidence can distinguish electrical delivery problems from voice signaling faults. It does not directly resolve the stated PoE class negotiation requirement.

Question 606

A Junos network engineer takes this step: Align the port's power allocation and supported PoE class with the phone's requirement. Which outcome most directly follows?

  1. The upgraded switch capacity can be sized to meet worst-case supported device demand.
  2. Power budget or fault evidence can distinguish electrical delivery problems from voice signaling faults.
  3. The port can supply power to a connected compatible powered device.
  4. The powered device can negotiate the level of electrical power it needs within switch limits.

Explanation

Correct Answer

D:

This is the direct result of the PoE class negotiation decision: The powered device can negotiate the level of electrical power it needs within switch limits.

Incorrect Answers

A:

This outcome is associated with PoE capacity planning (Reassess device-by-device PoE requirements before choosing switch hardware and power supplies.), not the specified action.

B:

This outcome is associated with PoE monitoring (Inspect Junos PoE port power consumption, allocation and fault status.), not the specified action.

C:

This outcome is associated with PoE port disabled (Enable the appropriate power-over-Ethernet function on the supported access port.), not the specified action.

Question 607

An IP phone requests a higher power allocation than the port's configured or supported class permits. A colleague instead suggests: Enable the appropriate power-over-Ethernet function on the supported access port. Which corrective approach most directly addresses the original issue?

  1. Align the port's power allocation and supported PoE class with the phone's requirement.
  2. Reassess device-by-device PoE requirements before choosing switch hardware and power supplies.
  3. Enable the appropriate power-over-Ethernet function on the supported access port.
  4. Inspect Junos PoE port power consumption, allocation and fault status.

Explanation

Correct Answer

A:

This corrective choice addresses PoE class negotiation. The powered device can negotiate the level of electrical power it needs within switch limits.

Incorrect Answers

B:

That alternative applies to PoE capacity planning instead. The upgraded switch capacity can be sized to meet worst-case supported device demand.

C:

That alternative applies to PoE port disabled instead. The port can supply power to a connected compatible powered device.

D:

That alternative applies to PoE monitoring instead. Power budget or fault evidence can distinguish electrical delivery problems from voice signaling faults.

Question 608

An enterprise network designer recommends: Align the port's power allocation and supported PoE class with the phone's requirement. Which situation most clearly calls for this action?

  1. A phone works on another switch interface but the target port reports its PoE delivery as administratively off.
  2. An IP phone requests a higher power allocation than the port's configured or supported class permits.
  3. The help desk cannot explain why a PoE phone reboots during peak power usage on a full switch.
  4. A network refresh adds higher-power wireless devices beside many low-power handsets on a limited electrical budget.

Explanation

Correct Answer

B:

This case requires the PoE class negotiation action. The powered device can negotiate the level of electrical power it needs within switch limits.

Incorrect Answers

A:

This other case would be better matched to Enable the appropriate power-over-Ethernet function on the supported access port. The port can supply power to a connected compatible powered device.

C:

This other case would be better matched to Inspect Junos PoE port power consumption, allocation and fault status. Power budget or fault evidence can distinguish electrical delivery problems from voice signaling faults.

D:

This other case would be better matched to Reassess device-by-device PoE requirements before choosing switch hardware and power supplies. The upgraded switch capacity can be sized to meet worst-case supported device demand.

Question 609

A newly installed desk phone has an Ethernet data link but cannot start because its power adapter is missing. Which Junos networking action or protocol decision best addresses this requirement?

  1. Calculate the aggregate power demand against the available switch or module PoE budget.
  2. Provide supported PoE power from a capable switch port or an approved injector.
  3. Reassess device-by-device PoE requirements before choosing switch hardware and power supplies.
  4. Inspect Junos PoE port power consumption, allocation and fault status.

Explanation

Correct Answer

B:

This action addresses PoE electrical power. The endpoint can receive both network connectivity and electrical power through the Ethernet path.

Incorrect Answers

A:

That action targets PoE switch budget: The design can identify whether the hardware has capacity for the full set of powered devices. It does not directly resolve the stated PoE electrical power requirement.

C:

That action targets PoE capacity planning: The upgraded switch capacity can be sized to meet worst-case supported device demand. It does not directly resolve the stated PoE electrical power requirement.

D:

That action targets PoE monitoring: Power budget or fault evidence can distinguish electrical delivery problems from voice signaling faults. It does not directly resolve the stated PoE electrical power requirement.

Question 610

A Junos network engineer takes this step: Provide supported PoE power from a capable switch port or an approved injector. Which outcome most directly follows?

  1. Power budget or fault evidence can distinguish electrical delivery problems from voice signaling faults.
  2. The upgraded switch capacity can be sized to meet worst-case supported device demand.
  3. The endpoint can receive both network connectivity and electrical power through the Ethernet path.
  4. The design can identify whether the hardware has capacity for the full set of powered devices.

Explanation

Correct Answer

C:

This is the direct result of the PoE electrical power decision: The endpoint can receive both network connectivity and electrical power through the Ethernet path.

Incorrect Answers

A:

This outcome is associated with PoE monitoring (Inspect Junos PoE port power consumption, allocation and fault status.), not the specified action.

B:

This outcome is associated with PoE capacity planning (Reassess device-by-device PoE requirements before choosing switch hardware and power supplies.), not the specified action.

D:

This outcome is associated with PoE switch budget (Calculate the aggregate power demand against the available switch or module PoE budget.), not the specified action.

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