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Cisco 300-710 Practice Test 30

Question 290

An engineer validates a Cisco Secure Firewall implementation: An operations engineer looks at a connection event but misreads the initiating and responding zone when attributing a deny. Which TWO complementary choices provide the most appropriate corrective action and its direct independent verification? Select TWO answers.

  1. Enable appropriate connection logging for the relevant policy and examine the matched rule, action, zones and flow identifiers.
  2. Inspect selected management domain, object ownership, inherited policies and test permissions in the intended child domain.
  3. Compare deployed policy, logging settings, event timestamps, rule identifiers and the actual source and destination tuple.
  4. Use supported application identification or custom detector methods based on recognizable traffic attributes and validate on controlled samples.
  5. Assume every firewall decision produces a complete connection event regardless of logging configuration.

Explanation

Correct Answers

A:

Appropriate implementation: Enable appropriate connection logging for the relevant policy and examine the matched rule, action, zones and flow identifiers. Case details: An operations engineer looks at a connection event but misreads the initiating and responding zone when attributing a deny. Governing behavior: Connection event visibility depends on rule logging and event fields; a permitted or blocked packet is not automatically linked to an intuitive UI label.

C:

Direct independent How to verify: Compare deployed policy, logging settings, event timestamps, rule identifiers and the actual source and destination tuple.

Incorrect Answers

B:

That option would inspect selected management domain, object ownership, inherited policies and test permissions in the intended child domain, but it addresses a different concern. Governing behavior: Connection event visibility depends on rule logging and event fields; a permitted or blocked packet is not automatically linked to an intuitive UI label.

D:

This alternative describes a different control, Application detector tuning and custom signatures, rather than this scenario’s Access policy rule logging and event attribution: Use supported application identification or custom detector methods based on recognizable traffic attributes and validate on controlled samples.

E:

Unsafe or unsupported shortcut for this firewall scenario: Assume every firewall decision produces a complete connection event regardless of logging configuration.

Question 291

A security operations incident describes: A network team wants to prevent access to malicious domains but configures only URL path matching, leaving DNS queries unreviewed. Which security configuration or operational step BEST addresses the requirement? Select ONE best answer.

  1. Select suitable supported network analysis policy settings and relevant preprocessors or inspectors, then validate behavior with representative traffic.
  2. Configure appropriate network discovery scope and review observed host attributes, data age and privacy boundaries.
  3. Assume a URL filtering rule automatically controls every DNS lookup for the same domain name.
  4. Apply appropriate DNS policy rules and documented security actions to the intended clients and domain indicators while testing exceptions.

Explanation

Correct Answer

D:

Appropriate implementation: Apply appropriate DNS policy rules and documented security actions to the intended clients and domain indicators while testing exceptions.

Incorrect Answers

A:

That option would select suitable supported network analysis policy settings and relevant preprocessors or inspectors, then validate behavior with representative traffic, but it addresses a different concern. Governing behavior: DNS security decisions operate on name resolution and are not interchangeable with application-layer URL path inspection.

B:

That option would configure appropriate network discovery scope and review observed host attributes, data age and privacy boundaries, but it addresses a different concern. Governing behavior: DNS security decisions operate on name resolution and are not interchangeable with application-layer URL path inspection.

C:

Unsafe or unsupported shortcut for this firewall scenario: Assume a URL filtering rule automatically controls every DNS lookup for the same domain name. It cannot establish the stated security outcome.

Question 292

During a firewall implementation acceptance test: A network team wants to prevent access to malicious domains but configures only URL path matching, leaving DNS queries unreviewed. Which firewall behavior or technical principle BEST explains the observed condition? Select ONE best answer.

  1. Dynamic reputation and blocklist inputs can change independently of local access rules and require freshness and false-positive review.
  2. Assume a URL filtering rule automatically controls every DNS lookup for the same domain name.
  3. A service port does not by itself prove the application protocol; application detectors use traffic characteristics with visibility constraints.
  4. DNS security decisions operate on name resolution and are not interchangeable with application-layer URL path inspection.

Explanation

Correct Answer

D:

Underlying platform principle: DNS security decisions operate on name resolution and are not interchangeable with application-layer URL path inspection.

Incorrect Answers

A:

This alternative describes a different control, Security intelligence and dynamic feed objects, rather than this scenario’s DNS policy sinkhole and domain security controls: Dynamic reputation and blocklist inputs can change independently of local access rules and require freshness and false-positive review.

B:

That option would assume a URL filtering rule automatically controls every DNS lookup for the same domain name, but it addresses a different concern. Approved action: Apply appropriate DNS policy rules and documented security actions to the intended clients and domain indicators while testing exceptions.

C:

This alternative describes a different control, Application detector tuning and custom signatures, rather than this scenario’s DNS policy sinkhole and domain security controls: A service port does not by itself prove the application protocol; application detectors use traffic characteristics with visibility constraints.

Question 293

A CCNP Security practice scenario presents this condition: A network team wants to prevent access to malicious domains but configures only URL path matching, leaving DNS queries unreviewed. Which specific evidence is MOST useful to confirm the real root cause? Select ONE best answer.

  1. Assume a URL filtering rule automatically controls every DNS lookup for the same domain name.
  2. Inspect DNS policy order, query events, resolver path and lookup outcomes for both blocked and approved domains.
  3. Inspect feed health, update timestamp, matched indicators, relevant connection blocks and approved exception records.
  4. Inspect object members, references, address inventory and matched rule results before and after proposed modifications.

Explanation

Correct Answer

B:

Direct independent verification: Inspect DNS policy order, query events, resolver path and lookup outcomes for both blocked and approved domains.

Incorrect Answers

A:

Unsafe or unsupported shortcut for this firewall scenario: Assume a URL filtering rule automatically controls every DNS lookup for the same domain name. It cannot establish the stated security outcome.

C:

That option would inspect feed health, update timestamp, matched indicators, relevant connection blocks and approved exception records, but it addresses a different concern. Governing behavior: DNS security decisions operate on name resolution and are not interchangeable with application-layer URL path inspection.

D:

This alternative describes a different control, Network and host object definition reuse, rather than this scenario’s DNS policy sinkhole and domain security controls: Inspect object members, references, address inventory and matched rule results before and after proposed modifications.

Question 294

A firewall service owner escalates the following: A network team wants to prevent access to malicious domains but configures only URL path matching, leaving DNS queries unreviewed. Which observed result BEST confirms that the change meets the intended security requirement? Select ONE best answer.

  1. Assume a URL filtering rule automatically controls every DNS lookup for the same domain name.
  2. Expected protocol traffic is inspected consistently with acceptable performance and unauthorized evasions are not silently ignored.
  3. Known malicious domain queries receive the intended security action while authorized internal names still resolve correctly.
  4. Authorized group members obtain intended access and unrelated identities fail the policy in a repeatable test.

Explanation

Correct Answer

C:

Required acceptance evidence: Known malicious domain queries receive the intended security action while authorized internal names still resolve correctly.

Incorrect Answers

A:

Unsafe or unsupported shortcut for this firewall scenario: Assume a URL filtering rule automatically controls every DNS lookup for the same domain name. Case details: A network team wants to prevent access to malicious domains but configures only URL path matching, leaving DNS queries unreviewed. Governing behavior: DNS security decisions operate on name resolution and are not interchangeable with application-layer URL path inspection.

B:

This alternative describes a different control, Network analysis policy protocol preprocessing, rather than this scenario’s DNS policy sinkhole and domain security controls: Expected protocol traffic is inspected consistently with acceptable performance and unauthorized evasions are not silently ignored.

D:

This alternative describes a different control, Identity-based rule mapping and directory sources, rather than this scenario’s DNS policy sinkhole and domain security controls: Authorized group members obtain intended access and unrelated identities fail the policy in a repeatable test.

Question 295

An approved maintenance window surfaces this issue: A network team wants to prevent access to malicious domains but configures only URL path matching, leaving DNS queries unreviewed. Which misleading assumption MOST directly causes this issue and must be rejected? Select ONE best answer.

  1. Assume externally sourced security indicators are always accurate and never require update checks or exception handling.
  2. Assume a URL filtering rule automatically controls every DNS lookup for the same domain name.
  3. Assume a classification of encrypted traffic means the firewall has read and verified all plaintext application contents.
  4. Assume logged event timestamps remain reliably comparable when management and sensor clocks are unsynchronized.

Explanation

Correct Answer

B:

Reject the scenario-specific unsafe assumption: Assume a URL filtering rule automatically controls every DNS lookup for the same domain name. The stated shortcut conflicts with the intended control and its documented verification.

Incorrect Answers

A:

That option would assume externally sourced security indicators are always accurate and never require update checks or exception handling, but it addresses a different concern. Governing behavior: DNS security decisions operate on name resolution and are not interchangeable with application-layer URL path inspection.

C:

That option would assume a classification of encrypted traffic means the firewall has read and verified all plaintext application contents, but it addresses a different concern. Governing behavior: DNS security decisions operate on name resolution and are not interchangeable with application-layer URL path inspection.

D:

That option would assume logged event timestamps remain reliably comparable when management and sensor clocks are unsynchronized, but it addresses a different concern. Governing behavior: DNS security decisions operate on name resolution and are not interchangeable with application-layer URL path inspection.

Question 296

A Secure Firewall deployment change request reports: A legitimate internal service is blocked because a DNS security action targets a broad domain category without a verified exception. Which security configuration or operational step BEST addresses the requirement? Select ONE best answer.

  1. Choose supported URL and application matching with explicit TLS decryption or metadata limitations and test exception scope.
  2. Align supported routing selection and QoS policies with documented egress, markings and bandwidth behavior.
  3. Apply appropriate DNS policy rules and documented security actions to the intended clients and domain indicators while testing exceptions.
  4. Assume a URL filtering rule automatically controls every DNS lookup for the same domain name.

Explanation

Correct Answer

C:

Appropriate implementation: Apply appropriate DNS policy rules and documented security actions to the intended clients and domain indicators while testing exceptions.

Incorrect Answers

A:

That option would choose supported URL and application matching with explicit TLS decryption or metadata limitations and test exception scope, but it addresses a different concern. Governing behavior: DNS security decisions operate on name resolution and are not interchangeable with application-layer URL path inspection.

B:

This alternative describes a different control, Firewall routing and QoS class policy, rather than this scenario’s DNS policy sinkhole and domain security controls: Align supported routing selection and QoS policies with documented egress, markings and bandwidth behavior.

D:

Unsafe or unsupported shortcut for this firewall scenario: Assume a URL filtering rule automatically controls every DNS lookup for the same domain name. It cannot establish the stated security outcome.

Question 297

An FMC policy and traffic review discovers: A legitimate internal service is blocked because a DNS security action targets a broad domain category without a verified exception. Which firewall behavior or technical principle BEST explains the observed condition? Select ONE best answer.

  1. Routing determines an eligible forwarding path, while QoS classification and queuing require suitable policy and actual congestion context.
  2. Assume a URL filtering rule automatically controls every DNS lookup for the same domain name.
  3. DNS security decisions operate on name resolution and are not interchangeable with application-layer URL path inspection.
  4. Access-control evaluation follows configured rule order and matching conditions, and a broad earlier match can make later rules unreachable.

Explanation

Correct Answer

C:

Underlying platform principle: DNS security decisions operate on name resolution and are not interchangeable with application-layer URL path inspection.

Incorrect Answers

A:

This alternative describes a different control, Firewall routing and QoS class policy, rather than this scenario’s DNS policy sinkhole and domain security controls: Routing determines an eligible forwarding path, while QoS classification and queuing require suitable policy and actual congestion context.

B:

Unsafe or unsupported shortcut for this firewall scenario: Assume a URL filtering rule automatically controls every DNS lookup for the same domain name. Case details: A legitimate internal service is blocked because a DNS security action targets a broad domain category without a verified exception. Governing behavior: DNS security decisions operate on name resolution and are not interchangeable with application-layer URL path inspection.

D:

This alternative describes a different control, Access control policy ordering and default behavior, rather than this scenario’s DNS policy sinkhole and domain security controls: Access-control evaluation follows configured rule order and matching conditions, and a broad earlier match can make later rules unreachable.

Question 298

An engineer validates a Cisco Secure Firewall implementation: A legitimate internal service is blocked because a DNS security action targets a broad domain category without a verified exception. Which specific evidence is MOST useful to confirm the real root cause? Select ONE best answer.

  1. Inspect DNS policy order, query events, resolver path and lookup outcomes for both blocked and approved domains.
  2. Compare deployed policy, logging settings, event timestamps, rule identifiers and the actual source and destination tuple.
  3. Inspect object members, references, address inventory and matched rule results before and after proposed modifications.
  4. Assume a URL filtering rule automatically controls every DNS lookup for the same domain name.

Explanation

Correct Answer

A:

Direct independent verification: Inspect DNS policy order, query events, resolver path and lookup outcomes for both blocked and approved domains.

Incorrect Answers

B:

That option would compare deployed policy, logging settings, event timestamps, rule identifiers and the actual source and destination tuple, but it addresses a different concern. Governing behavior: DNS security decisions operate on name resolution and are not interchangeable with application-layer URL path inspection.

C:

This alternative describes a different control, Network and host object definition reuse, rather than this scenario’s DNS policy sinkhole and domain security controls: Inspect object members, references, address inventory and matched rule results before and after proposed modifications.

D:

Unsafe or unsupported shortcut for this firewall scenario: Assume a URL filtering rule automatically controls every DNS lookup for the same domain name. Case details: A legitimate internal service is blocked because a DNS security action targets a broad domain category without a verified exception. Governing behavior: DNS security decisions operate on name resolution and are not interchangeable with application-layer URL path inspection. Approved action: Apply appropriate DNS policy rules and documented security actions to the intended clients and domain indicators while testing exceptions. Independent evidence: Inspect DNS policy order, query events, resolver path and lookup outcomes for both blocked and approved domains. Acceptance criterion: Known malicious domain queries receive the intended security action while authorized internal names still resolve correctly.

Question 299

A security operations incident describes: A legitimate internal service is blocked because a DNS security action targets a broad domain category without a verified exception. Which observed result BEST confirms that the change meets the intended security requirement? Select ONE best answer.

  1. Assume a URL filtering rule automatically controls every DNS lookup for the same domain name.
  2. Known malicious domain queries receive the intended security action while authorized internal names still resolve correctly.
  3. Potentially risky encrypted connections are triaged with documented confidence while payload privacy limitations remain explicit.
  4. Known benign test flows stop generating the false alert while genuine matching malicious patterns remain detectable.

Explanation

Correct Answer

B:

Required acceptance evidence: Known malicious domain queries receive the intended security action while authorized internal names still resolve correctly.

Incorrect Answers

A:

Unsafe or unsupported shortcut for this firewall scenario: Assume a URL filtering rule automatically controls every DNS lookup for the same domain name.

C:

This alternative describes a different control, Encrypted Visibility Engine TLS metadata analysis, rather than this scenario’s DNS policy sinkhole and domain security controls: Potentially risky encrypted connections are triaged with documented confidence while payload privacy limitations remain explicit.

D:

This alternative describes a different control, Custom intrusion rules and rule-set tuning, rather than this scenario’s DNS policy sinkhole and domain security controls: Known benign test flows stop generating the false alert while genuine matching malicious patterns remain detectable.

Question 300

During a firewall implementation acceptance test: A legitimate internal service is blocked because a DNS security action targets a broad domain category without a verified exception. Which THREE complementary elements form the corrective action, diagnostic proof and successful acceptance outcome? Select THREE answers.

  1. Inspect DNS policy order, query events, resolver path and lookup outcomes for both blocked and approved domains.
  2. Apply appropriate DNS policy rules and documented security actions to the intended clients and domain indicators while testing exceptions.
  3. Align supported routing selection and QoS policies with documented egress, markings and bandwidth behavior.
  4. Inspect effective SSL or TLS inspection settings, application identification and URL event fields for test sessions.
  5. Known malicious domain queries receive the intended security action while authorized internal names still resolve correctly.
  6. Assume a URL filtering rule automatically controls every DNS lookup for the same domain name.

Explanation

Correct Answers

A:

Direct independent How to verify: Inspect DNS policy order, query events, resolver path and lookup outcomes for both blocked and approved domains.

B:

Appropriate implementation: Apply appropriate DNS policy rules and documented security actions to the intended clients and domain indicators while testing exceptions. Case details: A legitimate internal service is blocked because a DNS security action targets a broad domain category without a verified exception. Governing behavior: DNS security decisions operate on name resolution and are not interchangeable with application-layer URL path inspection.

E:

Required acceptance evidence: Known malicious domain queries receive the intended security action while authorized internal names still resolve correctly. Case details: A legitimate internal service is blocked because a DNS security action targets a broad domain category without a verified exception. Governing behavior: DNS security decisions operate on name resolution and are not interchangeable with application-layer URL path inspection.

Incorrect Answers

C:

This alternative describes a different control, Firewall routing and QoS class policy, rather than this scenario’s DNS policy sinkhole and domain security controls: Align supported routing selection and QoS policies with documented egress, markings and bandwidth behavior. Case details: A legitimate internal service is blocked because a DNS security action targets a broad domain category without a verified exception. Governing behavior: DNS security decisions operate on name resolution and are not interchangeable with application-layer URL path inspection.

D:

That option would inspect effective SSL or TLS inspection settings, application identification and URL event fields for test sessions, but it addresses a different concern. Governing behavior: DNS security decisions operate on name resolution and are not interchangeable with application-layer URL path inspection.

F:

Unsafe or unsupported shortcut for this firewall scenario: Assume a URL filtering rule automatically controls every DNS lookup for the same domain name.

Securing Networks with Cisco Firewalls (300-710) Practice Tests