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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 56

Question 550

A Junos network engineer takes this step: Inspect Junos 802.1X session status and authorization details for that interface. Which outcome most directly follows?

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

Explanation

Correct Answer

B:

This is the direct result of the 802.1X session visibility decision: The operator can determine whether the client is unauthorized, pending, or assigned a 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 RADIUS Access-Accept (Apply the appropriate RADIUS Access-Accept authorization information at the switch.), not the specified action.

D:

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

Question 551

A computer cannot reach its enterprise VLAN after connecting to an authenticated switch port, though link LEDs are healthy. A colleague instead suggests: Configure the Junos switch as the 802.1X authenticator using an authorized backend RADIUS server. 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. Apply the appropriate RADIUS Access-Accept authorization information at the switch.
  3. Inspect Junos 802.1X session status and authorization details for that interface.
  4. Configure a supported periodic authentication check or reauthentication policy as appropriate.

Explanation

Correct Answer

C:

This corrective choice addresses 802.1X session visibility. The operator can determine whether the client is unauthorized, pending, or assigned a 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 RADIUS Access-Accept instead. An authenticated session can enter its permitted forwarding state and assigned network policy.

D:

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

Question 552

An enterprise network designer recommends: Inspect Junos 802.1X session status and authorization details for that interface. Which situation most clearly calls for this action?

  1. A known employee successfully completes EAP authentication and the network must permit the authorized access profile.
  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 computer cannot reach its enterprise VLAN after connecting to an authenticated switch port, though link LEDs are healthy.

Explanation

Correct Answer

D:

This case requires the 802.1X session visibility action. The operator can determine whether the client is unauthorized, pending, or assigned a policy.

Incorrect Answers

A:

This other case would be better matched to Apply the appropriate RADIUS Access-Accept authorization information at the switch. An authenticated session can enter its permitted forwarding state and assigned network 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 553

A headless network printer cannot run an 802.1X supplicant but the access policy still requires server-mediated admission. Which Junos networking action or protocol decision best addresses this requirement?

  1. Use a supported captive portal authentication workflow for the guest access design.
  2. Use MAC RADIUS authentication for the approved printer MAC on its switch interface.
  3. Correct the approved RADIUS VLAN authorization attributes and switch support for them.
  4. Configure an appropriate order among dot1x, MAC RADIUS and captive-portal methods.

Explanation

Correct Answer

B:

This action addresses Printer MAC RADIUS. The server can evaluate the device identity using MAC-based authentication rather than EAP credentials.

Incorrect Answers

A:

That action targets Captive portal interactive login: Browser users can complete the web-based admission process before receiving wider access. It does not directly resolve the stated Printer MAC RADIUS requirement.

C:

That action targets RADIUS attributes: The successful authentication can apply the intended dynamic VLAN authorization. It does not directly resolve the stated Printer MAC RADIUS requirement.

D:

That action targets Authentication method order: The preferred authentication method is attempted according to the intended policy sequence. It does not directly resolve the stated Printer MAC RADIUS requirement.

Question 554

A Junos network engineer takes this step: Use MAC RADIUS authentication for the approved printer MAC on its switch interface. Which outcome most directly follows?

  1. The successful authentication can apply the intended dynamic VLAN authorization.
  2. The preferred authentication method is attempted according to the intended policy sequence.
  3. The server can evaluate the device identity using MAC-based authentication rather than EAP credentials.
  4. Browser users can complete the web-based admission process before receiving wider access.

Explanation

Correct Answer

C:

This is the direct result of the Printer MAC RADIUS decision: The server can evaluate the device identity using MAC-based authentication rather than EAP credentials.

Incorrect Answers

A:

This outcome is associated with RADIUS attributes (Correct the approved RADIUS VLAN authorization attributes and switch support for them.), not the specified action.

B:

This outcome is associated with Authentication method order (Configure an appropriate order among dot1x, MAC RADIUS and captive-portal methods.), not the specified action.

D:

This outcome is associated with Captive portal interactive login (Use a supported captive portal authentication workflow for the guest access design.), not the specified action.

Question 555

A headless network printer cannot run an 802.1X supplicant but the access policy still requires server-mediated admission. A colleague instead suggests: Use a supported captive portal authentication workflow for the guest access design. Which corrective approach most directly addresses the original issue?

  1. Configure an appropriate order among dot1x, MAC RADIUS and captive-portal methods.
  2. Use a supported captive portal authentication workflow for the guest access design.
  3. Correct the approved RADIUS VLAN authorization attributes and switch support for them.
  4. Use MAC RADIUS authentication for the approved printer MAC on its switch interface.

Explanation

Correct Answer

D:

This corrective choice addresses Printer MAC RADIUS. The server can evaluate the device identity using MAC-based authentication rather than EAP credentials.

Incorrect Answers

A:

That alternative applies to Authentication method order instead. The preferred authentication method is attempted according to the intended policy sequence.

B:

That alternative applies to Captive portal interactive login instead. Browser users can complete the web-based admission process before receiving wider access.

C:

That alternative applies to RADIUS attributes instead. The successful authentication can apply the intended dynamic VLAN authorization.

Question 556

An enterprise network designer recommends: Use MAC RADIUS authentication for the approved printer MAC on its switch interface. Which situation most clearly calls for this action?

  1. A headless network printer cannot run an 802.1X supplicant but the access policy still requires server-mediated admission.
  2. Visitors use a web browser on the guest network and must accept terms or authenticate through a login page before unrestricted use.
  3. A RADIUS-authenticated switch user is authorized but lands in the wrong VLAN because the returned assignment attributes are misconfigured.
  4. An endpoint supports 802.1X but the access switch processes only MAC RADIUS, contrary to the planned primary method.

Explanation

Correct Answer

A:

This case requires the Printer MAC RADIUS action. The server can evaluate the device identity using MAC-based authentication rather than EAP credentials.

Incorrect Answers

B:

This other case would be better matched to Use a supported captive portal authentication workflow for the guest access design. Browser users can complete the web-based admission process before receiving wider access.

C:

This other case would be better matched to Correct the approved RADIUS VLAN authorization attributes and switch support for them. The successful authentication can apply the intended dynamic VLAN authorization.

D:

This other case would be better matched to Configure an appropriate order among dot1x, MAC RADIUS and captive-portal methods. The preferred authentication method is attempted according to the intended policy sequence.

Question 557

A non-802.1X endpoint is denied access because the registered MAC identifier differs from the address presented to RADIUS. Which Junos networking action or protocol decision best addresses this requirement?

  1. Inspect captive portal redirection, DNS reachability and HTTP/HTTPS interception policy.
  2. Correct the authorized MAC RADIUS identity record after verifying the endpoint's true address.
  3. Recognize the spoofing limitations of MAC identity and use stronger 802.1X when possible.
  4. Use a supported authentication-order design that tries 802.1X and then permitted MAC authentication where appropriate.

Explanation

Correct Answer

B:

This action addresses MAC RADIUS entry mismatch. The switch's MAC-based request can match the expected authorized device record.

Incorrect Answers

A:

That action targets Captive portal redirect failure: The portal can become reachable for an unauthenticated browser session. It does not directly resolve the stated MAC RADIUS entry mismatch requirement.

C:

That action targets MAC spoofing limitation: The security design does not mistake a changeable hardware address for a cryptographic credential. It does not directly resolve the stated MAC RADIUS entry mismatch requirement.

D:

That action targets 802.1X to MAC fallback: Legacy devices can follow a controlled alternative rather than bypassing all network admission checks. It does not directly resolve the stated MAC RADIUS entry mismatch requirement.

Question 558

A Junos network engineer takes this step: Correct the authorized MAC RADIUS identity record after verifying the endpoint's true address. Which outcome most directly follows?

  1. The security design does not mistake a changeable hardware address for a cryptographic credential.
  2. The portal can become reachable for an unauthenticated browser session.
  3. The switch's MAC-based request can match the expected authorized device record.
  4. Legacy devices can follow a controlled alternative rather than bypassing all network admission checks.

Explanation

Correct Answer

C:

This is the direct result of the MAC RADIUS entry mismatch decision: The switch's MAC-based request can match the expected authorized device record.

Incorrect Answers

A:

This outcome is associated with MAC spoofing limitation (Recognize the spoofing limitations of MAC identity and use stronger 802.1X when possible.), not the specified action.

B:

This outcome is associated with Captive portal redirect failure (Inspect captive portal redirection, DNS reachability and HTTP/HTTPS interception policy.), not the specified action.

D:

This outcome is associated with 802.1X to MAC fallback (Use a supported authentication-order design that tries 802.1X and then permitted MAC authentication where appropriate.), not the specified action.

Question 559

A non-802.1X endpoint is denied access because the registered MAC identifier differs from the address presented to RADIUS. A colleague instead suggests: Inspect captive portal redirection, DNS reachability and HTTP/HTTPS interception policy. Which corrective approach most directly addresses the original issue?

  1. Use a supported authentication-order design that tries 802.1X and then permitted MAC authentication where appropriate.
  2. Inspect captive portal redirection, DNS reachability and HTTP/HTTPS interception policy.
  3. Recognize the spoofing limitations of MAC identity and use stronger 802.1X when possible.
  4. Correct the authorized MAC RADIUS identity record after verifying the endpoint's true address.

Explanation

Correct Answer

D:

This corrective choice addresses MAC RADIUS entry mismatch. The switch's MAC-based request can match the expected authorized device record.

Incorrect Answers

A:

That alternative applies to 802.1X to MAC fallback instead. Legacy devices can follow a controlled alternative rather than bypassing all network admission checks.

B:

That alternative applies to Captive portal redirect failure instead. The portal can become reachable for an unauthenticated browser session.

C:

That alternative applies to MAC spoofing limitation instead. The security design does not mistake a changeable hardware address for a cryptographic credential.

Question 560

An enterprise network designer recommends: Correct the authorized MAC RADIUS identity record after verifying the endpoint's true address. Which situation most clearly calls for this action?

  1. A non-802.1X endpoint is denied access because the registered MAC identifier differs from the address presented to RADIUS.
  2. An Ethernet port serves a mix of domain computers and legacy devices that cannot respond to EAPOL.
  3. An operator proposes treating MAC-only admission as equivalent to strong certificate-based user authentication.
  4. A guest client has limited DHCP access but never sees the required authentication web page.

Explanation

Correct Answer

A:

This case requires the MAC RADIUS entry mismatch action. The switch's MAC-based request can match the expected authorized device record.

Incorrect Answers

B:

This other case would be better matched to Use a supported authentication-order design that tries 802.1X and then permitted MAC authentication where appropriate. Legacy devices can follow a controlled alternative rather than bypassing all network admission checks.

C:

This other case would be better matched to Recognize the spoofing limitations of MAC identity and use stronger 802.1X when possible. The security design does not mistake a changeable hardware address for a cryptographic credential.

D:

This other case would be better matched to Inspect captive portal redirection, DNS reachability and HTTP/HTTPS interception policy. The portal can become reachable for an unauthenticated browser session.

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