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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 54

Question 530

A Junos network engineer takes this step: Inspect EAPOL exchange between the supplicant and the switch authenticator. Which outcome most directly follows?

  1. The port can authorize the separate device roles according to the intended policy.
  2. The laptop can exchange EAP authentication information before ordinary network access is granted.
  3. The failing client can follow the configured rejection behavior instead of the nonresponse guest path.
  4. The operator can determine whether endpoint authentication signaling starts at Layer 2.

Explanation

Correct Answer

D:

This is the direct result of the EAPOL start decision: The operator can determine whether endpoint authentication signaling starts at Layer 2.

Incorrect Answers

A:

This outcome is associated with 802.1X multi-domain (Use a supported multi-domain 802.1X access configuration for voice and data devices.), not the specified action.

B:

This outcome is associated with 802.1X supplicant (Enable an 802.1X supplicant on the endpoint and a compatible authentication policy on the switch.), not the specified action.

C:

This outcome is associated with RADIUS Access-Reject (Treat the RADIUS Access-Reject as an authentication failure rather than as a missing EAP supplicant.), not the specified action.

Question 531

A client connects to an 802.1X-enabled port but no EAP session begins even though the link is up. A colleague instead suggests: Treat the RADIUS Access-Reject as an authentication failure rather than as a missing EAP supplicant. Which corrective approach most directly addresses the original issue?

  1. Inspect EAPOL exchange between the supplicant and the switch authenticator.
  2. Use a supported multi-domain 802.1X access configuration for voice and data devices.
  3. Treat the RADIUS Access-Reject as an authentication failure rather than as a missing EAP supplicant.
  4. Enable an 802.1X supplicant on the endpoint and a compatible authentication policy on the switch.

Explanation

Correct Answer

A:

This corrective choice addresses EAPOL start. The operator can determine whether endpoint authentication signaling starts at Layer 2.

Incorrect Answers

B:

That alternative applies to 802.1X multi-domain instead. The port can authorize the separate device roles according to the intended policy.

C:

That alternative applies to RADIUS Access-Reject instead. The failing client can follow the configured rejection behavior instead of the nonresponse guest path.

D:

That alternative applies to 802.1X supplicant instead. The laptop can exchange EAP authentication information before ordinary network access is granted.

Question 532

An enterprise network designer recommends: Inspect EAPOL exchange between the supplicant and the switch authenticator. Which situation most clearly calls for this action?

  1. An IP phone and a downstream computer share one access port but require distinct voice and data session policy.
  2. A client connects to an 802.1X-enabled port but no EAP session begins even though the link is up.
  3. A client submits invalid credentials and a security administrator wants to distinguish denial from a silent nonresponsive guest.
  4. A corporate laptop must present credentials before a switch allows regular data access on its Ethernet port.

Explanation

Correct Answer

B:

This case requires the EAPOL start action. The operator can determine whether endpoint authentication signaling starts at Layer 2.

Incorrect Answers

A:

This other case would be better matched to Use a supported multi-domain 802.1X access configuration for voice and data devices. The port can authorize the separate device roles according to the intended policy.

C:

This other case would be better matched to Treat the RADIUS Access-Reject as an authentication failure rather than as a missing EAP supplicant. The failing client can follow the configured rejection behavior instead of the nonresponse guest path.

D:

This other case would be better matched to Enable an 802.1X supplicant on the endpoint and a compatible authentication policy on the switch. The laptop can exchange EAP authentication information before ordinary network access is granted.

Question 533

A known employee successfully completes EAP authentication and the network must permit the authorized access profile. Which Junos networking action or protocol decision best addresses this requirement?

  1. Apply the appropriate RADIUS Access-Accept authorization information at the switch.
  2. Inspect Junos 802.1X session status and authorization details for that interface.
  3. Configure the Junos switch as the 802.1X authenticator using an authorized backend RADIUS server.
  4. Configure a supported periodic authentication check or reauthentication policy as appropriate.

Explanation

Correct Answer

A:

This action addresses RADIUS Access-Accept. An authenticated session can enter its permitted forwarding state and assigned network policy.

Incorrect Answers

B:

That action targets 802.1X session visibility: The operator can determine whether the client is unauthorized, pending, or assigned a policy. It does not directly resolve the stated RADIUS Access-Accept requirement.

C:

That action targets 802.1X authenticator role: The switch mediates EAP exchanges and enforces the authentication result on the port. It does not directly resolve the stated RADIUS Access-Accept requirement.

D:

That action targets 802.1X reauthentication: A connected session can be reevaluated instead of retaining its original authorization indefinitely. It does not directly resolve the stated RADIUS Access-Accept requirement.

Question 534

A Junos network engineer takes this step: Apply the appropriate RADIUS Access-Accept authorization information at the switch. Which outcome most directly follows?

  1. The switch mediates EAP exchanges and enforces the authentication result on the port.
  2. An authenticated session can enter its permitted forwarding state and assigned network policy.
  3. A connected session can be reevaluated instead of retaining its original authorization indefinitely.
  4. The operator can determine whether the client is unauthorized, pending, or assigned a policy.

Explanation

Correct Answer

B:

This is the direct result of the RADIUS Access-Accept decision: An authenticated session can enter its permitted forwarding state and assigned network policy.

Incorrect Answers

A:

This outcome is associated with 802.1X authenticator role (Configure the Junos switch as the 802.1X authenticator using an authorized backend RADIUS server.), not the specified action.

C:

This outcome is associated with 802.1X reauthentication (Configure a supported periodic authentication check or reauthentication policy as appropriate.), not the specified action.

D:

This outcome is associated with 802.1X session visibility (Inspect Junos 802.1X session status and authorization details for that interface.), not the specified action.

Question 535

A known employee successfully completes EAP authentication and the network must permit the authorized access profile. A colleague instead suggests: Configure a supported periodic authentication check or reauthentication policy as appropriate. Which corrective approach most directly addresses the original issue?

  1. Configure the Junos switch as the 802.1X authenticator using an authorized backend RADIUS server.
  2. Configure a supported periodic authentication check or reauthentication policy as appropriate.
  3. Apply the appropriate RADIUS Access-Accept authorization information at the switch.
  4. Inspect Junos 802.1X session status and authorization details for that interface.

Explanation

Correct Answer

C:

This corrective choice addresses RADIUS Access-Accept. An authenticated session can enter its permitted forwarding state and assigned network policy.

Incorrect Answers

A:

That alternative applies to 802.1X authenticator role instead. The switch mediates EAP exchanges and enforces the authentication result on the port.

B:

That alternative applies to 802.1X reauthentication instead. A connected session can be reevaluated instead of retaining its original authorization indefinitely.

D:

That alternative applies to 802.1X session visibility instead. The operator can determine whether the client is unauthorized, pending, or assigned a policy.

Question 536

An enterprise network designer recommends: Apply the appropriate RADIUS Access-Accept authorization information at the switch. Which situation most clearly calls for this action?

  1. A computer cannot reach its enterprise VLAN after connecting to an authenticated switch port, though link LEDs are healthy.
  2. A network architect mistakenly expects the access switch to validate employee passwords locally instead of relaying requests to RADIUS.
  3. A previously authenticated workstation no longer meets the expected policy but remains connected for long periods.
  4. A known employee successfully completes EAP authentication and the network must permit the authorized access profile.

Explanation

Correct Answer

D:

This case requires the RADIUS Access-Accept action. An authenticated session can enter its permitted forwarding state and assigned network policy.

Incorrect Answers

A:

This other case would be better matched to Inspect Junos 802.1X session status and authorization details for that interface. The operator can determine whether the client is unauthorized, pending, or assigned a policy.

B:

This other case would be better matched to Configure the Junos switch as the 802.1X authenticator using an authorized backend RADIUS server. The switch mediates EAP exchanges and enforces the authentication result on the port.

C:

This other case would be better matched to Configure a supported periodic authentication check or reauthentication policy as appropriate. A connected session can be reevaluated instead of retaining its original authorization indefinitely.

Question 537

A client submits invalid credentials and a security administrator wants to distinguish denial from a silent nonresponsive guest. Which Junos networking action or protocol decision best addresses this requirement?

  1. Inspect EAPOL exchange between the supplicant and the switch authenticator.
  2. Enable an 802.1X supplicant on the endpoint and a compatible authentication policy on the switch.
  3. Treat the RADIUS Access-Reject as an authentication failure rather than as a missing EAP supplicant.
  4. Use a supported multi-domain 802.1X access configuration for voice and data devices.

Explanation

Correct Answer

C:

This action addresses RADIUS Access-Reject. The failing client can follow the configured rejection behavior instead of the nonresponse guest path.

Incorrect Answers

A:

That action targets EAPOL start: The operator can determine whether endpoint authentication signaling starts at Layer 2. It does not directly resolve the stated RADIUS Access-Reject requirement.

B:

That action targets 802.1X supplicant: The laptop can exchange EAP authentication information before ordinary network access is granted. It does not directly resolve the stated RADIUS Access-Reject requirement.

D:

That action targets 802.1X multi-domain: The port can authorize the separate device roles according to the intended policy. It does not directly resolve the stated RADIUS Access-Reject requirement.

Question 538

A Junos network engineer takes this step: Treat the RADIUS Access-Reject as an authentication failure rather than as a missing EAP supplicant. Which outcome most directly follows?

  1. The laptop can exchange EAP authentication information before ordinary network access is granted.
  2. The operator can determine whether endpoint authentication signaling starts at Layer 2.
  3. The port can authorize the separate device roles according to the intended policy.
  4. The failing client can follow the configured rejection behavior instead of the nonresponse guest path.

Explanation

Correct Answer

D:

This is the direct result of the RADIUS Access-Reject decision: The failing client can follow the configured rejection behavior instead of the nonresponse guest path.

Incorrect Answers

A:

This outcome is associated with 802.1X supplicant (Enable an 802.1X supplicant on the endpoint and a compatible authentication policy on the switch.), not the specified action.

B:

This outcome is associated with EAPOL start (Inspect EAPOL exchange between the supplicant and the switch authenticator.), not the specified action.

C:

This outcome is associated with 802.1X multi-domain (Use a supported multi-domain 802.1X access configuration for voice and data devices.), not the specified action.

Question 539

A client submits invalid credentials and a security administrator wants to distinguish denial from a silent nonresponsive guest. A colleague instead suggests: Use a supported multi-domain 802.1X access configuration for voice and data devices. Which corrective approach most directly addresses the original issue?

  1. Treat the RADIUS Access-Reject as an authentication failure rather than as a missing EAP supplicant.
  2. Use a supported multi-domain 802.1X access configuration for voice and data devices.
  3. Inspect EAPOL exchange between the supplicant and the switch authenticator.
  4. Enable an 802.1X supplicant on the endpoint and a compatible authentication policy on the switch.

Explanation

Correct Answer

A:

This corrective choice addresses RADIUS Access-Reject. The failing client can follow the configured rejection behavior instead of the nonresponse guest path.

Incorrect Answers

B:

That alternative applies to 802.1X multi-domain instead. The port can authorize the separate device roles according to the intended policy.

C:

That alternative applies to EAPOL start instead. The operator can determine whether endpoint authentication signaling starts at Layer 2.

D:

That alternative applies to 802.1X supplicant instead. The laptop can exchange EAP authentication information before ordinary network access is granted.

Question 540

An enterprise network designer recommends: Treat the RADIUS Access-Reject as an authentication failure rather than as a missing EAP supplicant. Which situation most clearly calls for this action?

  1. A client connects to an 802.1X-enabled port but no EAP session begins even though the link is up.
  2. A client submits invalid credentials and a security administrator wants to distinguish denial from a silent nonresponsive guest.
  3. An IP phone and a downstream computer share one access port but require distinct voice and data session policy.
  4. A corporate laptop must present credentials before a switch allows regular data access on its Ethernet port.

Explanation

Correct Answer

B:

This case requires the RADIUS Access-Reject action. The failing client can follow the configured rejection behavior instead of the nonresponse guest path.

Incorrect Answers

A:

This other case would be better matched to Inspect EAPOL exchange between the supplicant and the switch authenticator. The operator can determine whether endpoint authentication signaling starts at Layer 2.

C:

This other case would be better matched to Use a supported multi-domain 802.1X access configuration for voice and data devices. The port can authorize the separate device roles according to the intended policy.

D:

This other case would be better matched to Enable an 802.1X supplicant on the endpoint and a compatible authentication policy on the switch. The laptop can exchange EAP authentication information before ordinary network access is granted.

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