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CompTIA N10-009 Practice Test 4

Question 30

A network team addresses this situation: A sensitive service permits unsolicited inbound connections even though return traffic should remain allowed. After the corrective action, which test or result BEST verifies that the problem is resolved?

  1. Try an approved site and a blocked destination with a test user.
  2. Attempt a denied new session and confirm permitted reply packets still pass.
  3. Verify each host's gateway and test a permitted inter-subnet route.
  4. Mount the shared directory from two authorized clients and test permissions.

Explanation

Correct Answer

B:

Negative and positive connection tests validate stateful filtering.

Incorrect Answers

A:

Try an approved site and a blocked destination with a test user. That check cannot demonstrate attempt a denied new session and confirm permitted reply packets still pass.

C:

A working Layer 3 path establishes correct routed connectivity. That check cannot demonstrate attempt a denied new session and confirm permitted reply packets still pass.

D:

Mount the shared directory from two authorized clients and test permissions. That check cannot demonstrate attempt a denied new session and confirm permitted reply packets still pass.

Question 31

A network specialist investigates this evidence: A sensitive service permits unsolicited inbound connections even though return traffic should remain allowed. Which underlying condition BEST explains the observed failure or requirement?

  1. Unhealthy backends remain eligible for traffic distribution.
  2. Origin servers are unnecessarily exposed to direct internet access.
  3. The policy does not restrict new session initiation.
  4. No Layer 3 device forwards between the distinct IP networks.

Explanation

Correct Answer

C:

The policy does not restrict new session initiation. State tables distinguish established responses from unwanted new flows.

Incorrect Answers

A:

Unhealthy backends remain eligible for traffic distribution. That does not establish the defined inbound-versus-return session policy.

B:

Unprotected origin servers are an inbound reverse-proxy exposure, not a failure of client outbound web filtering. The missing change involves the policy does not restrict new session initiation.

D:

No Layer 3 device forwards between the distinct IP networks. That does not establish the defined inbound-versus-return session policy.

Question 32

A network team observes: Threat signatures generate alerts but malicious packets continue to reach the target and the goal is inline prevention. What is the MOST appropriate corrective action or technical decision?

  1. Install an appropriately managed access switch and connect it to the existing uplink.
  2. Publish the application behind a hardened reverse proxy and block direct origin reachability.
  3. Use a NAS file service with appropriate SMB or NFS access controls.
  4. Use a suitably tuned inline intrusion prevention function for the attack path.

Explanation

Correct Answer

D:

An IDS observes while an IPS can block matching traffic inline. Passive detection does not interrupt malicious flows.

Incorrect Answers

A:

Installing an appropriately managed access switch and connecting it to the existing uplink would not meet the need for a suitably tuned inline intrusion prevention function for the attack path.

B:

Publishing the application behind a hardened reverse proxy and block direct origin reachability would not meet the need for a suitably tuned inline intrusion prevention function for the attack path.

C:

Using a NAS file service with appropriate SMB or NFS access controls would not meet the need for a suitably tuned inline intrusion prevention function for the attack path.

Question 33

A network team addresses this situation: Threat signatures generate alerts but malicious packets continue to reach the target and the goal is inline prevention. After the corrective action, which test or result BEST verifies that the problem is resolved?

  1. Send an authorized test signature and verify prevention plus an audit event.
  2. Confirm link negotiation and MAC learning for clients on different access ports.
  3. Attempt the application through the proxy and directly to the origin.
  4. Stop the application on one node and confirm new requests use healthy targets.

Explanation

Correct Answer

A:

A blocked test packet proves enforcement, not merely detection.

Incorrect Answers

B:

Learning multiple hosts proves the local switching function. That check cannot demonstrate send an authorized test signature and verify prevention plus an audit event.

C:

Success through proxy and denial direct to origin validate isolation. That check cannot demonstrate send an authorized test signature and verify prevention plus an audit event.

D:

A load balancer routes requests only to backends that satisfy its configured health checks. Verification of this result involves send an authorized test signature and verify prevention plus an audit event.

Question 34

A network team observes: A web application has two backend nodes but the traffic manager still sends users to a failed backend. What is the MOST appropriate corrective action or technical decision?

  1. Install an appropriately managed access switch and connect it to the existing uplink.
  2. Configure application-relevant health checks and remove failed targets automatically.
  3. Use a suitably tuned inline intrusion prevention function for the attack path.
  4. Publish the application behind a hardened reverse proxy and block direct origin reachability.

Explanation

Correct Answer

B:

Load-balancer membership must follow service health rather than just host presence. Unhealthy backends remain eligible for traffic distribution.

Incorrect Answers

A:

Installing an appropriately managed access switch and connecting it to the existing uplink would not configure application-relevant health checks and remove failed targets automatically.

C:

Using a suitably tuned inline intrusion prevention function for the attack path would not configure application-relevant health checks and remove failed targets automatically.

D:

Publishing the application behind a hardened reverse proxy and block direct origin reachability would not configure application-relevant health checks and remove failed targets automatically.

Question 35

A network team addresses this situation: A web application has two backend nodes but the traffic manager still sends users to a failed backend. After the corrective action, which test or result BEST verifies that the problem is resolved?

  1. Confirm link negotiation and MAC learning for clients on different access ports.
  2. Try an approved site and a blocked destination with a test user.
  3. Stop the application on one node and confirm new requests use healthy targets.
  4. Attempt the application through the proxy and directly to the origin.

Explanation

Correct Answer

C:

A load balancer routes requests only to backends that satisfy its configured health checks. Verification of this result involves stop the application on one node and confirm new requests use healthy targets.

Incorrect Answers

A:

Learning multiple hosts proves the local switching function. That check cannot demonstrate traffic delivery to healthy application targets.

B:

Try an approved site and a blocked destination with a test user. That check cannot demonstrate traffic delivery to healthy application targets.

D:

Success through proxy and denial direct to origin validate isolation. That check cannot demonstrate traffic delivery to healthy application targets.

Question 36

A network specialist investigates this evidence: A web application has two backend nodes but the traffic manager still sends users to a failed backend. Which underlying condition BEST explains the observed failure or requirement?

  1. The office lacks sufficient local Layer 2 access ports.
  2. Outbound client requests lack an explicit proxy policy point.
  3. Origin servers are unnecessarily exposed to direct internet access.
  4. Unhealthy backends remain eligible for traffic distribution.

Explanation

Correct Answer

D:

Unhealthy backends remain eligible for traffic distribution. Load-balancer membership must follow service health rather than just host presence.

Incorrect Answers

A:

The office lacks sufficient local Layer 2 access ports. That does not establish unhealthy backends remain eligible for traffic distribution.

B:

The missing control is a forward proxy enforcing client egress policy before browsing reaches internet destinations. That does not establish unhealthy backends remain eligible for traffic distribution.

C:

Unprotected origin servers are an inbound reverse-proxy exposure, not a failure of client outbound web filtering. The missing change involves unhealthy backends remain eligible for traffic distribution.

Question 37

A network team observes: A branch must apply web destination policy to employee browsing before traffic reaches internet destinations. What is the MOST appropriate corrective action or technical decision?

  1. Route supported web requests through an authenticated forward proxy with filtering.
  2. Configure application-relevant health checks and remove failed targets automatically.
  3. Publish the application behind a hardened reverse proxy and block direct origin reachability.
  4. Provide a router or routed switch interface for each subnet with appropriate policy.

Explanation

Correct Answer

A:

Forward proxies enforce client egress rules and can log destinations. Outbound client requests lack an explicit proxy policy point.

Incorrect Answers

B:

Configuring application-relevant health checks and removing failed targets automatically would not route supported web requests through an authenticated forward proxy with filtering.

C:

Publishing the application behind a hardened reverse proxy and block direct origin reachability would not route supported web requests through an authenticated forward proxy with filtering.

D:

Providing a router or routed switch interface for each subnet with appropriate policy would not route supported web requests through an authenticated forward proxy with filtering.

Question 38

A network team addresses this situation: A branch must apply web destination policy to employee browsing before traffic reaches internet destinations. After the corrective action, which test or result BEST verifies that the problem is resolved?

  1. Attempt the application through the proxy and directly to the origin.
  2. Try an approved site and a blocked destination with a test user.
  3. Stop the application on one node and confirm new requests use healthy targets.
  4. Attempt a denied new session and confirm permitted reply packets still pass.

Explanation

Correct Answer

B:

Try an approved site and a blocked destination with a test user.

Incorrect Answers

A:

Success through proxy and denial direct to origin validate isolation. That check cannot demonstrate try an approved site and a blocked destination with a test user.

C:

A load balancer routes requests only to backends that satisfy its configured health checks. Verification of this result involves try an approved site and a blocked destination with a test user.

D:

Negative and positive connection tests validate stateful filtering. That check cannot demonstrate try an approved site and a blocked destination with a test user.

Question 39

A network specialist investigates this evidence: A branch must apply web destination policy to employee browsing before traffic reaches internet destinations. Which underlying condition BEST explains the observed failure or requirement?

  1. Origin servers are unnecessarily exposed to direct internet access.
  2. Unhealthy backends remain eligible for traffic distribution.
  3. Outbound client requests lack an explicit proxy policy point.
  4. The workload requires file-level sharing rather than block storage presentation.

Explanation

Correct Answer

C:

Outbound client requests lack an explicit proxy policy point. Forward proxies enforce client egress rules and can log destinations.

Incorrect Answers

A:

Unprotected origin servers are an inbound reverse-proxy exposure, not a failure of client outbound web filtering. The missing change involves outbound client requests lack an explicit proxy policy point.

B:

Unhealthy backends remain eligible for traffic distribution. That does not establish the authorized proxy forwarding path.

D:

Both endpoints must agree on character encoding for transmitted bytes to produce readable text. That does not establish the authorized proxy forwarding path.

Question 40

A network team observes: Public clients must reach an internal HTTP service without learning or directly accessing its application server address. What is the MOST appropriate corrective action or technical decision?

  1. Provide a router or routed switch interface for each subnet with appropriate policy.
  2. Use a suitably tuned inline intrusion prevention function for the attack path.
  3. Configure application-relevant health checks and remove failed targets automatically.
  4. Publish the application behind a hardened reverse proxy and block direct origin reachability.

Explanation

Correct Answer

D:

The proxy terminates external requests and isolates internal origins. Origin servers are unnecessarily exposed to direct internet access.

Incorrect Answers

A:

Providing a router or routed switch interface for each subnet with appropriate policy would not publish the application behind a hardened reverse proxy and block direct origin reachability.

B:

Using a suitably tuned inline intrusion prevention function for the attack path would not publish the application behind a hardened reverse proxy and block direct origin reachability.

C:

Configuring application-relevant health checks and removing failed targets automatically would not publish the application behind a hardened reverse proxy and block direct origin reachability.


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