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CompTIA N10-009 Practice Test 5

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.

Question 41

A network team addresses this situation: Public clients must reach an internal HTTP service without learning or directly accessing its application server address. 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. Send an authorized test signature and verify prevention plus an audit event.
  3. Verify each host's gateway and test a permitted inter-subnet route.
  4. Try an approved site and a blocked destination with a test user.

Explanation

Correct Answer

A:

Success through proxy and denial direct to origin validate isolation.

Incorrect Answers

B:

A blocked test packet proves enforcement, not merely detection. That check cannot demonstrate the authorized proxy forwarding path.

C:

A working Layer 3 path establishes correct routed connectivity. That check cannot demonstrate the authorized proxy forwarding path.

D:

Try an approved site and a blocked destination with a test user. That check cannot demonstrate the authorized proxy forwarding path.

Question 42

A network specialist investigates this evidence: Public clients must reach an internal HTTP service without learning or directly accessing its application server address. Which underlying condition BEST explains the observed failure or requirement?

  1. Outbound client requests lack an explicit proxy policy point.
  2. Origin servers are unnecessarily exposed to direct internet access.
  3. No Layer 3 device forwards between the distinct IP networks.
  4. Unhealthy backends remain eligible for traffic distribution.

Explanation

Correct Answer

B:

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

Incorrect Answers

A:

The missing control is a forward proxy enforcing client egress policy before browsing reaches internet destinations.

C:

No Layer 3 device forwards between the distinct IP networks. That does not establish the authorized proxy forwarding path.

D:

Unhealthy backends remain eligible for traffic distribution. The missing change involves origin servers are unnecessarily exposed to direct internet access.

Question 43

A network team observes: A creative team needs shared file paths over Ethernet, not raw block volumes for virtual machines. 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. Use a suitably tuned inline intrusion prevention function for the attack path.
  3. Use a NAS file service with appropriate SMB or NFS access controls.
  4. Deploy stateful filtering allowing approved inbound sessions and their return traffic.

Explanation

Correct Answer

C:

NAS serves files through network file protocols while SAN commonly exposes blocks. The workload requires file-level sharing rather than block storage presentation.

Incorrect Answers

A:

Installing an appropriately managed access switch and connecting it to the existing uplink would not meet the need for a NAS file service with appropriate SMB or NFS access controls.

B:

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

D:

Deploying stateful filtering allowing approved inbound sessions and their return traffic would not meet the need for a NAS file service with appropriate SMB or NFS access controls.

Question 44

A network team addresses this situation: A creative team needs shared file paths over Ethernet, not raw block volumes for virtual machines. 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. Send an authorized test signature and verify prevention plus an audit event.
  3. Try an approved site and a blocked destination with a test user.
  4. Mount the shared directory from two authorized clients and test permissions.

Explanation

Correct Answer

D:

Concurrent file access checks the required storage semantics.

Incorrect Answers

A:

Learning multiple hosts proves the local switching function. That check cannot demonstrate mount the shared directory from two authorized clients and test permissions.

B:

A blocked test packet proves enforcement, not merely detection. That check cannot demonstrate mount the shared directory from two authorized clients and test permissions.

C:

Try an approved site and a blocked destination with a test user. That check cannot demonstrate mount the shared directory from two authorized clients and test permissions.

Question 45

A network specialist investigates this evidence: A creative team needs shared file paths over Ethernet, not raw block volumes for virtual machines. Which underlying condition BEST explains the observed failure or requirement?

  1. The workload requires file-level sharing rather than block storage presentation.
  2. The office lacks sufficient local Layer 2 access ports.
  3. Passive detection does not interrupt malicious flows.
  4. Outbound client requests lack an explicit proxy policy point.

Explanation

Correct Answer

A:

The workload requires file-level sharing rather than block storage presentation. NAS serves files through network file protocols while SAN commonly exposes blocks.

Incorrect Answers

B:

The office lacks sufficient local Layer 2 access ports. That does not establish consistent application text encoding and decoding.

C:

Passive detection does not interrupt malicious flows. That does not establish consistent application text encoding and decoding.

D:

The missing control is a forward proxy enforcing client egress policy before browsing reaches internet destinations. That does not establish consistent application text encoding and decoding.

Question 46

A network team observes: A cloud workload in a private subnet is accessible from the internet because a public route and permissive access rules were added. What is the MOST appropriate corrective action or technical decision?

  1. Add scoped reciprocal traffic rules for the actual return direction and ports.
  2. Remove unintended public ingress and constrain cloud network policy to approved peers.
  3. Establish a managed site-to-site IPsec VPN with correct selectors and routing.
  4. Use the provider's supported dedicated connectivity service with redundant paths.

Explanation

Correct Answer

B:

Isolation needs route and access-control agreement in the virtual network. Network exposure contradicts the private subnet requirement.

Incorrect Answers

A:

Adding scoped reciprocal traffic rules for the actual return direction and ports would not remove unintended public ingress and constrain cloud network policy to approved peers.

C:

Establishing a managed site-to-site IPsec VPN with correct selectors and routing would not remove unintended public ingress and constrain cloud network policy to approved peers.

D:

Using the provider's supported dedicated connectivity service with redundant paths would not remove unintended public ingress and constrain cloud network policy to approved peers.

Question 47

A network team addresses this situation: A cloud workload in a private subnet is accessible from the internet because a public route and permissive access rules were added. After the corrective action, which test or result BEST verifies that the problem is resolved?

  1. Capture the handshake and confirm outbound return packets pass.
  2. Check negotiated ESP associations and send authorized subnet-to-subnet traffic.
  3. Test public reachability denial while internal allowed connections succeed.
  4. Measure sustained throughput and failover across independent private links.

Explanation

Correct Answer

C:

Path tests show both route policy and traffic enforcement.

Incorrect Answers

A:

SYN-ACK propagation proves reciprocal stateless rules are correct. It does not test public reachability denial while internal allowed connections succeed.

B:

Encrypted packet and end-to-end evidence validate the tunnel. It does not test public reachability denial while internal allowed connections succeed.

D:

Link and failover measurements demonstrate the design objective. It does not test public reachability denial while internal allowed connections succeed.

Question 48

A network specialist investigates this evidence: A cloud workload in a private subnet is accessible from the internet because a public route and permissive access rules were added. Which underlying condition BEST explains the observed failure or requirement?

  1. Stateless ACL rules do not remember allowed sessions.
  2. Private network traffic crosses an untrusted transport.
  3. The private subnet needs outbound address translation without public instance addresses.
  4. Network exposure contradicts the private subnet requirement.

Explanation

Correct Answer

D:

Network exposure contradicts the private subnet requirement. Isolation needs route and access-control agreement in the virtual network.

Incorrect Answers

A:

Stateful firewalls can distinguish permitted connection initiation from return traffic. That does not establish network exposure contradicts the private subnet requirement.

B:

Private network traffic crosses an untrusted transport. That does not establish network exposure contradicts the private subnet requirement.

C:

NAT rewrites connection addresses or ports according to an explicit translation rule. That does not establish network exposure contradicts the private subnet requirement.

Question 49

A network team observes: A cloud team adds a return-traffic inbound allow rule for responses on ephemeral ports despite stateful security group evaluation. What is the MOST appropriate corrective action or technical decision?

  1. Apply only needed session-initiation rules in the stateful security group.
  2. Route outbound internet traffic through an approved NAT gateway while preserving private ingress restrictions.
  3. Establish a managed site-to-site IPsec VPN with correct selectors and routing.
  4. Use the provider's supported dedicated connectivity service with redundant paths.

Explanation

Correct Answer

A:

Stateful groups automatically permit return traffic for allowed flows. The team is confusing stateful flow tracking with stateless acl semantics.

Incorrect Answers

B:

Routing outbound internet traffic through an approved NAT gateway while preserving private ingress restrictions would not apply only needed session-initiation rules in the stateful security group.

C:

Establishing a managed site-to-site IPsec VPN with correct selectors and routing would not apply only needed session-initiation rules in the stateful security group.

D:

Using the provider's supported dedicated connectivity service with redundant paths would not apply only needed session-initiation rules in the stateful security group.

Question 50

A network team addresses this situation: A cloud team adds a return-traffic inbound allow rule for responses on ephemeral ports despite stateful security group evaluation. After the corrective action, which test or result BEST verifies that the problem is resolved?

  1. Fetch a signed update from a test instance and verify unsolicited inbound denial.
  2. Initiate an allowed outbound connection without a separate return inbound rule.
  3. Measure sustained throughput and failover across independent private links.
  4. Check negotiated ESP associations and send authorized subnet-to-subnet traffic.

Explanation

Correct Answer

B:

Initiate an allowed outbound connection without a separate return inbound rule.

Incorrect Answers

A:

Outbound success with inbound denial validates translation boundaries. That check cannot demonstrate initiate an allowed outbound connection without a separate return inbound rule.

C:

Link and failover measurements demonstrate the design objective. That check cannot demonstrate initiate an allowed outbound connection without a separate return inbound rule.

D:

Encrypted packet and end-to-end evidence validate the tunnel. That check cannot demonstrate initiate an allowed outbound connection without a separate return inbound rule.


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