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Cisco 300-715 Practice Test 29

Question 280

An IBNS low-impact policy accidentally grants the entire production subnet to clients before EAP completes. The observed failure is: An overly permissive preauth ACL defeats isolation even when later authorization is strict. Which controlled recovery BEST restores the intended state?

  1. The supported recovery is to disable DHCP during EAP-TLS certificate provisioning to reduce packet counts.
  2. The supported recovery is to permit any IP traffic in the preauthentication ACL to simplify rollout.
  3. The supported recovery is to restrict the preauthentication ACL and validate allowed bootstrap traffic and denied applications.
  4. The supported recovery is to treat a preauth ACL as evidence that credentials were validated.

Explanation

Correct Answer

C:

Low-impact deployment deliberately grants bounded unauthenticated connectivity for bootstrap tasks. Recheck port control state, preauth ACL content, 802.1X exchange, dACL and permitted DHCP packets.

Incorrect Answers

A:

Disable DHCP during EAP-TLS certificate provisioning to reduce packet counts. This action does not repair the identified failure. An overly permissive preauth ACL defeats isolation even when later authorization is strict. Instead, restrict the preauthentication ACL and validate allowed bootstrap traffic and denied applications. For the specific situation, an IBNS low-impact policy accidentally grants the entire production subnet to clients before EAP completes.

B:

Permit any IP traffic in the preauthentication ACL to simplify rollout. This action does not repair the identified failure. An overly permissive preauth ACL defeats isolation even when later authorization is strict. Instead, restrict the preauthentication ACL and validate allowed bootstrap traffic and denied applications. For the specific situation, an IBNS low-impact policy accidentally grants the entire production subnet to clients before EAP completes.

D:

Treat a preauth ACL as evidence that credentials were validated. This action does not repair the identified failure. An overly permissive preauth ACL defeats isolation even when later authorization is strict. Instead, restrict the preauthentication ACL and validate allowed bootstrap traffic and denied applications. For the specific situation, an IBNS low-impact policy accidentally grants the entire production subnet to clients before EAP completes.

Question 281

A new 802.1X deployment must ensure unauthenticated workstations have no network access beyond supported control traffic. What is the BEST supported ISE implementation or corrective action?

  1. Use supported closed-mode 802.1X port control and authorize traffic only after a successful policy decision.
  2. Leave all access ports permanently open because a RADIUS server exists.
  3. Assume a switch interface description enforces closed authentication.
  4. Configure low-impact permit-all access but describe the port as fully closed.

Explanation

Correct Answer

A:

Verify the effect through switch session authorization, EAP result, packet capture before authentication and applied access policy. For the specific situation, a new 802.1X deployment must ensure unauthenticated workstations have no network access beyond supported control traffic.

Incorrect Answers

B:

This does not implement the required control for Closed mode wired port authorization. Applying only a monitoring policy cannot deliver the intended deny-before-authentication behavior.

C:

Assume a switch interface description enforces closed authentication. This alternative overlooks a required prerequisite or targets the wrong function. Closed-mode access generally limits ordinary data traffic until authentication and authorization complete. The relevant evidence is switch session authorization, EAP result, packet capture before authentication and applied access policy. For the specific situation, a new 802.1X deployment must ensure unauthenticated workstations have no network access beyond supported control traffic.

D:

Applying only a monitoring policy cannot deliver the intended deny-before-authentication behavior. Instead the intended policy action is use supported closed-mode 802.1X port control and authorize traffic only after a successful policy decision.

Question 282

A new 802.1X deployment must ensure unauthenticated workstations have no network access beyond supported control traffic. Which evidence BEST verifies the intended operational outcome?

  1. A successful ICMP echo that does not test the required identity-service workflow.
  2. A browser theme label without a current authorization trace.
  3. An old diagram with no RADIUS, TACACS+ or endpoint-session evidence.
  4. Switch session authorization, EAP result, packet capture before authentication and applied access policy.

Explanation

Correct Answer

D:

These observations directly establish the result of Closed mode wired port authorization for the described endpoint or network device. For the specific situation, a new 802.1X deployment must ensure unauthenticated workstations have no network access beyond supported control traffic.

Incorrect Answers

A:

This observation cannot verify Closed mode wired port authorization. Closed-mode access generally limits ordinary data traffic until authentication and authorization complete.

B:

This observation cannot verify Closed mode wired port authorization. For the specific situation, a new 802.1X deployment must ensure unauthenticated workstations have no network access beyond supported control traffic.

C:

This observation cannot verify Closed mode wired port authorization. Check switch session authorization, EAP result, packet capture before authentication and applied access policy.

Question 283

A new 802.1X deployment must ensure unauthenticated workstations have no network access beyond supported control traffic. Which technical principle BEST explains the required decision?

  1. Closed-mode access generally limits ordinary data traffic until authentication and authorization complete.
  2. All Cisco ISE administration and policy personas perform exactly the same service.
  3. A captive portal page automatically changes network authorization on every active NAD session without signaling.
  4. A MAC address is a cryptographic proof of endpoint device ownership.

Explanation

Correct Answer

A:

The supported implementation is to use supported closed-mode 802.1X port control and authorize traffic only after a successful policy decision. For the specific situation, a new 802.1X deployment must ensure unauthenticated workstations have no network access beyond supported control traffic.

Incorrect Answers

B:

This generalization is not valid for Closed mode wired port authorization. Instead closed-mode access generally limits ordinary data traffic until authentication and authorization complete.

C:

This generalization is not valid for Closed mode wired port authorization. For the specific situation, a new 802.1X deployment must ensure unauthenticated workstations have no network access beyond supported control traffic.

D:

This generalization is not valid for Closed mode wired port authorization. Verify the actual state using switch session authorization, EAP result, packet capture before authentication and applied access policy.

Question 284

A new 802.1X deployment must ensure unauthenticated workstations have no network access beyond supported control traffic. An operator proposes the following incorrect shortcut: Leave all access ports permanently open because a RADIUS server exists. What material risk or failure follows from that shortcut?

  1. Accurate device accounting automatically created every earlier failed EAP exchange.
  2. Inspecting a correct endpoint certificate generated the original directory outage.
  3. Applying only a monitoring policy cannot deliver the intended deny-before-authentication behavior.
  4. A justified least-privilege ACL caused every unrelated network authentication fault.

Explanation

Correct Answer

C:

The shortcut is unsuitable because closed-mode access generally limits ordinary data traffic until authentication and authorization complete. For the specific situation, a new 802.1X deployment must ensure unauthenticated workstations have no network access beyond supported control traffic.

Incorrect Answers

A:

This unrelated assertion does not explain the Closed mode wired port authorization problem. The relevant risk is that applying only a monitoring policy cannot deliver the intended deny-before-authentication behavior.

B:

This unrelated assertion does not explain the Closed mode wired port authorization problem. For the specific situation, a new 802.1X deployment must ensure unauthenticated workstations have no network access beyond supported control traffic.

D:

This unrelated assertion does not explain the Closed mode wired port authorization problem. Check switch session authorization, EAP result, packet capture before authentication and applied access policy.

Question 285

A new 802.1X deployment must ensure unauthenticated workstations have no network access beyond supported control traffic. The observed failure is: Applying only a monitoring policy cannot deliver the intended deny-before-authentication behavior. Which controlled recovery BEST restores the intended state?

  1. Assume a switch interface description enforces closed authentication.
  2. Configure low-impact permit-all access but describe the port as fully closed.
  3. Correct the port mode and confirm denied unauthorized traffic then successful authorized connectivity.
  4. Leave all access ports permanently open because a RADIUS server exists.

Explanation

Correct Answer

C:

Closed-mode access generally limits ordinary data traffic until authentication and authorization complete. For the specific situation, a new 802.1X deployment must ensure unauthenticated workstations have no network access beyond supported control traffic.

Incorrect Answers

A:

Assume a switch interface description enforces closed authentication. This action does not repair the identified failure. Applying only a monitoring policy cannot deliver the intended deny-before-authentication behavior. Instead, correct the port mode and confirm denied unauthorized traffic then successful authorized connectivity. For the specific situation, a new 802.1X deployment must ensure unauthenticated workstations have no network access beyond supported control traffic.

B:

Configure low-impact permit-all access but describe the port as fully closed. This action does not repair the identified failure. Applying only a monitoring policy cannot deliver the intended deny-before-authentication behavior. Instead, correct the port mode and confirm denied unauthorized traffic then successful authorized connectivity. For the specific situation, a new 802.1X deployment must ensure unauthenticated workstations have no network access beyond supported control traffic.

D:

Leave all access ports permanently open because a RADIUS server exists. This action does not repair the identified failure. Applying only a monitoring policy cannot deliver the intended deny-before-authentication behavior. Instead, correct the port mode and confirm denied unauthorized traffic then successful authorized connectivity. For the specific situation, a new 802.1X deployment must ensure unauthenticated workstations have no network access beyond supported control traffic.

Question 286

An isolated secure floor sees an unintended printer send production data before the authenticator grants access. Which configuration decision most directly satisfies the requirement?

  1. In this case, assume a switch interface description enforces closed authentication.
  2. In this case, use supported closed-mode 802.1X port control and authorize traffic only after a successful policy decision.
  3. In this case, configure low-impact permit-all access but describe the port as fully closed.
  4. In this case, leave all access ports permanently open because a RADIUS server exists.

Explanation

Correct Answer

B:

Verify the effect through switch session authorization, EAP result, packet capture before authentication and applied access policy. For the specific situation, an isolated secure floor sees an unintended printer send production data before the authenticator grants access.

Incorrect Answers

A:

Assume a switch interface description enforces closed authentication. This alternative overlooks a required prerequisite or targets the wrong function. Closed-mode access generally limits ordinary data traffic until authentication and authorization complete. The relevant evidence is switch session authorization, EAP result, packet capture before authentication and applied access policy. For the specific situation, an isolated secure floor sees an unintended printer send production data before the authenticator grants access.

C:

Applying only a monitoring policy cannot deliver the intended deny-before-authentication behavior. For the specific situation, an isolated secure floor sees an unintended printer send production data before the authenticator grants access.

D:

This does not implement the required control for Closed mode wired port authorization. Use the supported approach: use supported closed-mode 802.1X port control and authorize traffic only after a successful policy decision.

Question 287

An isolated secure floor sees an unintended printer send production data before the authenticator grants access. What observations most directly test this network-access condition?

  1. The supporting evidence is a device hostname alone without the policy result or authenticated source.
  2. The supporting evidence is a successful ICMP echo that does not test the required identity-service workflow.
  3. The supporting evidence is switch session authorization, EAP result, packet capture before authentication and applied access policy.
  4. The supporting evidence is a browser theme label without a current authorization trace.

Explanation

Correct Answer

C:

These observations directly establish the result of Closed mode wired port authorization for the described endpoint or network device. For the specific situation, an isolated secure floor sees an unintended printer send production data before the authenticator grants access.

Incorrect Answers

A:

This observation cannot verify Closed mode wired port authorization. For the specific situation, an isolated secure floor sees an unintended printer send production data before the authenticator grants access.

B:

This observation cannot verify Closed mode wired port authorization. A successful ICMP echo that does not test the required identity-service workflow.

D:

This observation cannot verify Closed mode wired port authorization. A browser theme label without a current authorization trace.

Question 288

An isolated secure floor sees an unintended printer send production data before the authenticator grants access. What principle of ISE authentication and authorization explains this case?

  1. The governing principle is that a MAC address is a cryptographic proof of endpoint device ownership.
  2. The governing principle is that all Cisco ISE administration and policy personas perform exactly the same service.
  3. The governing principle is that a policy display name alone is the complete source of enforcement state.
  4. The governing principle is that closed-mode access generally limits ordinary data traffic until authentication and authorization complete.

Explanation

Correct Answer

D:

The supported implementation is to use supported closed-mode 802.1X port control and authorize traffic only after a successful policy decision. For the specific situation, an isolated secure floor sees an unintended printer send production data before the authenticator grants access.

Incorrect Answers

A:

This generalization is not valid for Closed mode wired port authorization. For the specific situation, an isolated secure floor sees an unintended printer send production data before the authenticator grants access.

B:

This generalization is not valid for Closed mode wired port authorization. All Cisco ISE administration and policy personas perform exactly the same service.

C:

This generalization is not valid for Closed mode wired port authorization. A policy display name alone is the complete source of enforcement state.

Question 289

An isolated secure floor sees an unintended printer send production data before the authenticator grants access. An operator proposes the following incorrect shortcut: Leave all access ports permanently open because a RADIUS server exists. Which negative consequence BEST explains the shortcut’s flaw?

  1. The material consequence is that a justified least-privilege ACL caused every unrelated network authentication fault.
  2. The material consequence is that a correctly recorded TACACS command audit caused the preceding security violation.
  3. The material consequence is that applying only a monitoring policy cannot deliver the intended deny-before-authentication behavior.
  4. The material consequence is that inspecting a correct endpoint certificate generated the original directory outage.

Explanation

Correct Answer

C:

The shortcut is unsuitable because closed-mode access generally limits ordinary data traffic until authentication and authorization complete. For the specific situation, an isolated secure floor sees an unintended printer send production data before the authenticator grants access.

Incorrect Answers

A:

This unrelated assertion does not explain the Closed mode wired port authorization problem. For the specific situation, an isolated secure floor sees an unintended printer send production data before the authenticator grants access.

B:

This unrelated assertion does not explain the Closed mode wired port authorization problem. A correctly recorded TACACS command audit caused the preceding security violation.

D:

This unrelated assertion does not explain the Closed mode wired port authorization problem. Inspecting a correct endpoint certificate generated the original directory outage.

Question 290

An isolated secure floor sees an unintended printer send production data before the authenticator grants access. The observed failure is: Applying only a monitoring policy cannot deliver the intended deny-before-authentication behavior. How should the administrator correct and verify this failure?

  1. The supported recovery is to correct the port mode and confirm denied unauthorized traffic then successful authorized connectivity.
  2. The supported recovery is to configure low-impact permit-all access but describe the port as fully closed.
  3. The supported recovery is to leave all access ports permanently open because a RADIUS server exists.
  4. The supported recovery is to assume a switch interface description enforces closed authentication.

Explanation

Correct Answer

A:

Closed-mode access generally limits ordinary data traffic until authentication and authorization complete. For the specific situation, an isolated secure floor sees an unintended printer send production data before the authenticator grants access.

Incorrect Answers

B:

Configure low-impact permit-all access but describe the port as fully closed. This action does not repair the identified failure. Applying only a monitoring policy cannot deliver the intended deny-before-authentication behavior. Instead, correct the port mode and confirm denied unauthorized traffic then successful authorized connectivity. For the specific situation, an isolated secure floor sees an unintended printer send production data before the authenticator grants access.

C:

Leave all access ports permanently open because a RADIUS server exists. This action does not repair the identified failure. Applying only a monitoring policy cannot deliver the intended deny-before-authentication behavior. Instead, correct the port mode and confirm denied unauthorized traffic then successful authorized connectivity. For the specific situation, an isolated secure floor sees an unintended printer send production data before the authenticator grants access.

D:

Assume a switch interface description enforces closed authentication. This action does not repair the identified failure. Applying only a monitoring policy cannot deliver the intended deny-before-authentication behavior. Instead, correct the port mode and confirm denied unauthorized traffic then successful authorized connectivity. For the specific situation, an isolated secure floor sees an unintended printer send production data before the authenticator grants access.

Implementing and Configuring Cisco Identity Services Engine (300-715 SISE) (300-715) Practice Tests