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Last Update: Nov 14, 2026

N10-009 Training Course: 240 Video Lectures

N10-009 PDF Study Guide: 128 Pages

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CompTIA N10-009 Practice Test 58

Question 570

A network team observes: A person without a badge enters the network operations room by following an authorized employee. What is the MOST appropriate corrective action or technical decision?

  1. Use resistant MFA with reporting and rapid revocation of compromised credentials.
  2. Use staffed or electronic single-person access with visitor escort procedures.
  3. Use certificate-validated enterprise authentication and monitor for rogue APs.
  4. Engage provider-side DDoS filtering or scrubbing before the saturated link.

Explanation

Correct Answer

B:

Physical access checks must bind every entrant to authorization. Anti-tailgating policy lacks an enforceable entry control.

Incorrect Answers

A:

Anti-tailgating policy lacks an enforceable entry control.

C:

Using certificate-validated enterprise authentication and monitoring for rogue APs would not meet the need for staffed or electronic single-person access with visitor escort procedures.

D:

Engage provider-side DDoS filtering or scrubbing would not meet the need for staffed or electronic single-person access with visitor escort procedures.

Question 571

A network team addresses this situation: A person without a badge enters the network operations room by following an authorized employee. After the corrective action, which test or result BEST verifies that the problem is resolved?

  1. Revoke a test factor and attempt the captured password on the real VPN.
  2. Connect a controlled rogue DHCP server to an untrusted port and inspect dropped offers.
  3. Observe a supervised access attempt without a valid badge.
  4. Generate controlled source-MAC changes and inspect violation counters.

Explanation

Correct Answer

C:

Observe a supervised access attempt without a valid badge.

Incorrect Answers

A:

Revoke a test factor and attempt the captured password on the real VPN. It does not observe a supervised access attempt without a valid badge.

B:

DHCP assigns client network parameters through a supported lease exchange. It does not observe a supervised access attempt without a valid badge.

D:

Generate controlled source-MAC changes and inspect violation counters. It does not observe a supervised access attempt without a valid badge.

Question 572

A network specialist investigates this evidence: A person without a badge enters the network operations room by following an authorized employee. Which underlying condition BEST explains the observed failure or requirement?

  1. Credential-harvesting social engineering bypasses user suspicion.
  2. Incoming traffic volume exceeds upstream link capacity.
  3. A counterfeit wireless access point impersonates the SSID.
  4. Anti-tailgating policy lacks an enforceable entry control.

Explanation

Correct Answer

D:

Anti-tailgating policy lacks an enforceable entry control. Physical access checks must bind every entrant to authorization.

Incorrect Answers

A:

Phishing resilience requires identity controls plus response. That does not establish anti-tailgating policy lacks an enforceable entry control.

B:

Incoming traffic volume exceeds upstream link capacity. That does not establish anti-tailgating policy lacks an enforceable entry control.

C:

A counterfeit wireless access point impersonates the SSID. That does not establish anti-tailgating policy lacks an enforceable entry control.

Question 573

A network team observes: Unoccupied switch jacks in a public lobby remain live on the internal operations VLAN. What is the MOST appropriate corrective action or technical decision?

  1. Administratively disable unused jacks until an approved activation request.
  2. Isolate IoT devices in restricted zones with only required video-service flows.
  3. Place public services in a screened subnet with narrowly filtered internal paths.
  4. Implement default-deny inter-VLAN controls with explicit internet-only guest paths.

Explanation

Correct Answer

A:

Reducing active physical interfaces reduces attack surface. Unused ports create unmonitored internal access opportunities.

Incorrect Answers

B:

Isolate IoT devices in restricted zones with only required video-service flows would not address the need for administratively disable unused jacks until an approved activation request.

C:

Placing public services in a screened subnet with narrowly filtered internal paths would not address the need for administratively disable unused jacks until an approved activation request.

D:

Implementing default-deny inter-VLAN controls with explicit internet-only guest paths would not address the need for administratively disable unused jacks until an approved activation request.

Question 574

A network team addresses this situation: Unoccupied switch jacks in a public lobby remain live on the internal operations VLAN. After the corrective action, which test or result BEST verifies that the problem is resolved?

  1. Compromise-simulate web host reachability to directory ports.
  2. Plug a test endpoint into an unused port and confirm no network access.
  3. Try camera-initiated connections to payroll and approved recorder.
  4. Generate a second unauthorized source MAC and inspect the violation action.

Explanation

Correct Answer

B:

Plug a test endpoint into an unused port and confirm no network access.

Incorrect Answers

A:

Denied unauthorized lateral flows prove screened subnet isolation. That check cannot demonstrate plug a test endpoint into an unused port and confirm no network access.

C:

Denial and permitted recorder flow validate zoning. That check cannot demonstrate plug a test endpoint into an unused port and confirm no network access.

D:

Generate a second unauthorized source MAC and inspect the violation action. That check cannot demonstrate plug a test endpoint into an unused port and confirm no network access.

Question 575

A network specialist investigates this evidence: Unoccupied switch jacks in a public lobby remain live on the internal operations VLAN. Which underlying condition BEST explains the observed failure or requirement?

  1. Insecure IoT devices create a pivot into sensitive user systems.
  2. Internet-exposed systems have direct access to critical internal infrastructure.
  3. Unused ports create unmonitored internal access opportunities.
  4. First-match ACL evaluation makes the later deny ineffective.

Explanation

Correct Answer

C:

Unused ports create unmonitored internal access opportunities. Reducing active physical interfaces reduces attack surface.

Incorrect Answers

A:

Insecure IoT devices create a pivot into sensitive user systems. That does not establish unused ports create unmonitored internal access opportunities.

B:

Internet-exposed systems have direct access to critical internal infrastructure. That does not establish unused ports create unmonitored internal access opportunities.

D:

Stateful firewalls can distinguish permitted connection initiation from return traffic. That does not establish unused ports create unmonitored internal access opportunities.

Question 576

A network team observes: New branch routers are installed with a publicly documented manufacturer administrator password. What is the MOST appropriate corrective action or technical decision?

  1. Apply maintained URL filtering with suitable exception governance.
  2. Implement default-deny inter-VLAN controls with explicit internet-only guest paths.
  3. Place public services in a screened subnet with narrowly filtered internal paths.
  4. Replace defaults with managed unique credentials before network deployment.

Explanation

Correct Answer

D:

Published shared defaults cannot establish accountable access. Default credentials permit simple unauthorized administrative entry.

Incorrect Answers

A:

URL filtering constrains browsing destinations at web policy enforcement points. Published shared defaults cannot establish accountable access.

B:

Guest policy should not inherit trusted employee network rights. Published shared defaults cannot establish accountable access.

C:

A DMZ separates external-facing hosts from trusted networks. Published shared defaults cannot establish accountable access.

Question 577

A network team addresses this situation: New branch routers are installed with a publicly documented manufacturer administrator password. After the corrective action, which test or result BEST verifies that the problem is resolved?

  1. Try the published factory credential and confirm authentication failure.
  2. Compromise-simulate web host reachability to directory ports.
  3. Attempt an authorized test upload with a sensitive-data pattern.
  4. Test the prohibited remote management connection and review hit counters.

Explanation

Correct Answer

A:

Try the published factory credential and confirm authentication failure.

Incorrect Answers

B:

Denied unauthorized lateral flows prove screened subnet isolation. That check cannot demonstrate try the published factory credential and confirm authentication failure.

C:

Upload block or alert verifies content recognition. That check cannot demonstrate try the published factory credential and confirm authentication failure.

D:

Test the prohibited remote management connection and review hit counters. That check cannot demonstrate try the published factory credential and confirm authentication failure.

Question 578

A network specialist investigates this evidence: New branch routers are installed with a publicly documented manufacturer administrator password. Which underlying condition BEST explains the observed failure or requirement?

  1. Unused ports create unmonitored internal access opportunities.
  2. Default credentials permit simple unauthorized administrative entry.
  3. Internet-exposed systems have direct access to critical internal infrastructure.
  4. Insecure IoT devices create a pivot into sensitive user systems.

Explanation

Correct Answer

B:

Default credentials permit simple unauthorized administrative entry. Published shared defaults cannot establish accountable access.

Incorrect Answers

A:

Unused ports create unmonitored internal access opportunities. That does not establish default credentials permit simple unauthorized administrative entry.

C:

Internet-exposed systems have direct access to critical internal infrastructure. That does not establish default credentials permit simple unauthorized administrative entry.

D:

Insecure IoT devices create a pivot into sensitive user systems. That does not establish default credentials permit simple unauthorized administrative entry.

Question 579

A network team observes: A conference-room Ethernet jack admits arbitrary laptops to the employee VLAN. What is the MOST appropriate corrective action or technical decision?

  1. Implement default-deny inter-VLAN controls with explicit internet-only guest paths.
  2. Administratively disable unused jacks until an approved activation request.
  3. Enable 802.1X with approved EAP methods and restricted fallback where required.
  4. Isolate IoT devices in restricted zones with only required video-service flows.

Explanation

Correct Answer

C:

NAC can authorize the endpoint before normal network access. Physical connectivity is not tied to verified device or user identity.

Incorrect Answers

A:

Implementing default-deny inter-VLAN controls with explicit internet-only guest paths would not enable 802.1X with approved EAP methods and restricted fallback where required.

B:

Administratively disable unused jacks until an approved activation request would not enable 802.1X with approved EAP methods and restricted fallback where required.

D:

Isolate IoT devices in restricted zones with only required video-service flows would not enable 802.1X with approved EAP methods and restricted fallback where required.

Question 580

A network team addresses this situation: A conference-room Ethernet jack admits arbitrary laptops to the employee VLAN. After the corrective action, which test or result BEST verifies that the problem is resolved?

  1. Test guest-to-printer denial while guest DNS and internet succeed.
  2. Try camera-initiated connections to payroll and approved recorder.
  3. Plug a test endpoint into an unused port and confirm no network access.
  4. Attach a compliant and an unauthorized endpoint and observe their VLAN access.

Explanation

Correct Answer

D:

VLAN membership and 802.1Q tagging determine which Layer 2 broadcast domain carries each frame. Verification of this result involves attach a compliant and an unauthorized endpoint and observe their VLAN access.

Incorrect Answers

A:

DNS resolution maps hostnames to records and can fail independently of packet forwarding. That check cannot demonstrate correct switch VLAN and trunk classification.

B:

Denial and permitted recorder flow validate zoning. That check cannot demonstrate correct switch VLAN and trunk classification.

C:

Plug a test endpoint into an unused port and confirm no network access. That check cannot demonstrate correct switch VLAN and trunk classification.


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