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CompTIA PT0-003 Practice Test 68

Question 670

A company cannot explain why an old DNS mail exchanger still appears in public records. Which evidence most strongly validates the intended interpretation or control?

  1. The observed MX values match the latest authoritative zone response.
  2. A list of candidate names includes timestamps and ownership verification notes.
  3. Each candidate host has source citations and an approved next step.
  4. The evidence maps historical certificate subjects to relevant dates.

Explanation

Correct Answer

A:

The observed MX values match the latest authoritative zone response. This answer directly addresses the described constraint. Current DNS answers identify public mail routing independently of internal diagrams. Successful validation requires: The observed MX values match the latest authoritative zone response.

Incorrect Answers

B:

This result applies to a different case: A client asks testers to discover public subdomains without sending packets to the client's servers. Certificate issuance logs expose hostnames passively but do not prove current ownership. It does not establish the present requirement, where the observed MX values match the latest authoritative zone response. The relevant evidence is: The observed MX values match the latest authoritative zone response.

C:

That approach concerns a different situation: a client wants the passive discovery of hosts from public certificate names and DNS records. Multiple passive sources reduce the chance of relying on a stale artifact. The required result is that the observed MX values match the latest authoritative zone response. The relevant evidence is: The observed MX values match the latest authoritative zone response.

D:

That relates to a different issue: An organization wants publicly exposed SSL certificate history for a retired hostname. Certificates can reveal previously registered names and issuance chronology. That is not a direct remedy for the requested outcome: The observed MX values match the latest authoritative zone response. The relevant evidence is: The observed MX values match the latest authoritative zone response.

Question 671

An approved web test discovers a hostname used by the client's separate billing provider. How should the analyst respond based on the described evidence and scope?

  1. Hold testing against the resolved out-of-range address and seek scope clarification.
  2. Review and comply with the provider's service terms before scanning cloud resources.
  3. Exclude the hostname until the third party issues explicit written authorization.
  4. Minimize access, protect the evidence, and follow the agreed privacy reporting path.

Explanation

Correct Answer

C:

The correct assessment decision is exclude the hostname until the third party issues explicit written authorization. The relevant technical principle is: Discovery alone does not extend legal authorization to another owner. It is confirmed when logs show no requests to the third-party host before approval.

Incorrect Answers

A:

That relates to a different issue: A client lists 10.40.0.0/24 as the only authorized internal range, but an asset resolves to 10.41.0.8. A resolved IP outside the signed CIDR range is not automatically included. That is not a direct remedy for the requested outcome: Logs show no requests to the third-party host before approval. The appropriate action is: Exclude the hostname until the third party issues explicit written authorization.

B:

It would address a cloud provider permits vulnerability scanning only under defined acceptable-use conditions. The relevant reason in that case is: A customer's permission cannot override a hosting provider's contractual constraints. Here the required success condition is logs show no requests to the third-party host before approval. The appropriate action is: Exclude the hostname until the third party issues explicit written authorization.

D:

That approach concerns a different situation: a researcher uncovers likely personal data during an authorized test of a public portal. Authorization to test does not grant unlimited personal-data collection. The required result is that logs show no requests to the third-party host before approval. The appropriate action is: Exclude the hostname until the third party issues explicit written authorization.

Question 672

A tester wants to infer whether an address is active while ICMP echo replies are blocked. Which authorized assessment decision best addresses this particular situation?

  1. Distinguish a closed UDP port from an open service based on the ICMP response type.
  2. Interpret silence as open-or-filtered rather than definite closure and validate cautiously.
  3. Use other authorized host-discovery signals rather than declaring the host absent.
  4. Inspect an approved mirrored traffic capture instead of probing the controller.

Explanation

Correct Answer

C:

Firewalls can suppress ping despite active TCP listeners. Therefore select: Use other authorized host-discovery signals rather than declaring the host absent. For this specific situation the expected proof is: Host presence is inferred from safe observed protocol replies.

Incorrect Answers

A:

That approach concerns a different situation: a server sends an ICMP destination-unreachable response during a UDP assessment. Certain ICMP unreachable codes are evidence of blocked or unavailable UDP destinations. The required result is that host presence is inferred from safe observed protocol replies. The appropriate action is: Use other authorized host-discovery signals rather than declaring the host absent.

B:

That relates to a different issue: A UDP application is suspected, but no response appears to a generic UDP probe. UDP scanning often lacks reliable positive replies without an application response. That is not a direct remedy for the requested outcome: Host presence is inferred from safe observed protocol replies. The appropriate action is: Use other authorized host-discovery signals rather than declaring the host absent.

D:

This action applies to a different case: A tester needs to identify an industrial controller while the plant prohibits active protocol enumeration. Passive OT reconnaissance reduces risk of disrupting fragile control equipment. It does not establish the present requirement, where host presence is inferred from safe observed protocol replies. The appropriate action is: Use other authorized host-discovery signals rather than declaring the host absent.

Question 673

Nearby phones receive unsolicited Bluetooth messages from an unknown device. What response best meets the technical and engagement constraints?

  1. Assess training-data leakage and apply model access and privacy controls.
  2. Identify prompt injection and enforce separation of retrieved content from trusted instructions.
  3. Classify bluejacking or Bluetooth spamming and enforce pairing/message restrictions.
  4. Use nonintrusive capture or approved protocol-analysis tooling.

Explanation

Correct Answer

C:

The source-based choice is classify bluejacking or bluetooth spamming and enforce pairing/message restrictions. Unsolicited proximity-based messages do not require classic network compromise. Evidence should show that the test handset blocks unapproved messages while normal pairing works.

Incorrect Answers

A:

This action applies to a different case: A model endpoint outputs confidential training examples when prompted with generic cues. Model behavior can expose sensitive memorized data. It does not establish the present requirement, where the test handset blocks unapproved messages while normal pairing works. The appropriate action is: Classify bluejacking or Bluetooth spamming and enforce pairing/message restrictions.

B:

That approach concerns a different situation: an AI assistant retrieves an untrusted web page that contains instructions to send private documents. Untrusted source data must not gain authority over tool operations. The required result is that the test handset blocks unapproved messages while normal pairing works. The appropriate action is: Classify bluejacking or Bluetooth spamming and enforce pairing/message restrictions.

D:

It would address a security engineer needs to inspect BLE advertising data for an approved IoT sensor. The relevant reason in that case is: Bluetooth advertisement fields can disclose device information passively. Here the required success condition is the test handset blocks unapproved messages while normal pairing works. The appropriate action is: Classify bluejacking or Bluetooth spamming and enforce pairing/message restrictions.

Question 674

A requester claims to own a customer-facing app but cannot prove authority to authorize testing. What outcome is consistent with the correct authorized test?

  1. Request logs contain the allowed route and no excluded admin path.
  2. The subsidiary appears only after a signed scope amendment.
  3. The project file includes owner identity and a signed permission letter.
  4. The test record flags the asset as excluded and records the owner's decision.

Explanation

Correct Answer

C:

This matches the current authorized case: The project file includes owner identity and a signed permission letter. A verbal request from an unverified party is insufficient legal approval. The observable criterion is the project file includes owner identity and a signed permission letter.

Incorrect Answers

A:

It would address a client shares a URL containing a deep path but excludes the administrative console on the same host. The relevant reason in that case is: URL-level exclusions can narrow a host-level test authorization. Here the required success condition is the project file includes owner identity and a signed permission letter. The relevant evidence is: The project file includes owner identity and a signed permission letter.

B:

This result applies to a different case: An authorized tester is invited to inspect an adjacent subsidiary that is absent from the signed contract. Corporate affiliation does not automatically extend scoped legal permission. It does not establish the present requirement, where the project file includes owner identity and a signed permission letter. The relevant evidence is: The project file includes owner identity and a signed permission letter.

D:

That relates to a different issue: A client lists 10.40.0.0/24 as the only authorized internal range, but an asset resolves to 10.41.0.8. A resolved IP outside the signed CIDR range is not automatically included. That is not a direct remedy for the requested outcome: The project file includes owner identity and a signed permission letter. The relevant evidence is: The project file includes owner identity and a signed permission letter.

Question 675

A threat model asks which category covers an attacker changing stored invoice values. Which acceptance-test result would directly establish that the issue was addressed?

  1. The design maps IT and process-control assets to appropriate levels.
  2. The test case traces to the applicable MASVS control area.
  3. The model maps the forged identity to spoofing mitigations.
  4. The documented threat is classified as tampering with a protective control.

Explanation

Correct Answer

D:

The documented threat is classified as tampering with a protective control. This answer directly addresses the described constraint. STRIDE describes six threat classes, including unauthorized modification. Successful validation requires: The documented threat is classified as tampering with a protective control.

Incorrect Answers

A:

That relates to a different issue: An industrial plant needs a diagram of enterprise, supervisory, and process-control zones. Purdue levels organize industrial control network functions and boundaries. That is not a direct remedy for the requested outcome: The documented threat is classified as tampering with a protective control. The relevant evidence is: The documented threat is classified as tampering with a protective control.

B:

It would address a mobile team needs verification criteria for client-side storage and authentication controls. The relevant reason in that case is: MASVS defines mobile application security verification requirements. Here the required success condition is the documented threat is classified as tampering with a protective control. The relevant evidence is: The documented threat is classified as tampering with a protective control.

C:

This result applies to a different case: An architect needs to categorize a forged authenticated principal in a design diagram. Spoofing concerns impersonating an identity or authentication claim. It does not establish the present requirement, where the documented threat is classified as tampering with a protective control. The relevant evidence is: The documented threat is classified as tampering with a protective control.

Question 676

A web gateway trusts an unsigned JWT claim that a user is an administrator. Which conclusion or control should be prioritized in the test plan?

  1. Identify server-side template injection and sandbox template expressions.
  2. Require signature verification and server-side authorization before accepting claims.
  3. Identify server-side request forgery and enforce outbound allowlists or controlled proxying.
  4. Identify remote file inclusion risk and restrict executable include sources.

Explanation

Correct Answer

B:

The correct assessment decision is require signature verification and server-side authorization before accepting claims. The relevant technical principle is: Untrusted token content must never grant privileged API access. It is confirmed when a forged admin claim in a test token cannot access privileged routes.

Incorrect Answers

A:

That approach concerns a different situation: a report generator uses user input inside its server-side template expression parser. Template engines may execute operators or expose objects when input is treated as syntax. The required result is that a forged admin claim in a test token cannot access privileged routes. The appropriate action is: Require signature verification and server-side authorization before accepting claims.

C:

It would address a picture import URL is fetched by a server with access to internal service endpoints. The relevant reason in that case is: User-supplied destinations can redirect server trust to internal resources. Here the required success condition is a forged admin claim in a test token cannot access privileged routes. The appropriate action is: Require signature verification and server-side authorization before accepting claims.

D:

This action applies to a different case: A theme installer accepts an external URL that is included into server-side code execution. Server execution should not import untrusted remote code. It does not establish the present requirement, where a forged admin claim in a test token cannot access privileged routes. The appropriate action is: Require signature verification and server-side authorization before accepting claims.

Question 677

A site map lists admin pages under a different product hostname than the approved portal. Which test evidence best satisfies the stated professional requirement?

  1. Rate and count metrics fall within the revised authorized limits.
  2. The inventory lists each bucket's effective approved public-access setting.
  3. Only allowed pages appear in the final crawl evidence.
  4. The authorization map lists principal, scope, and effective role.

Explanation

Correct Answer

C:

Discovery by crawling must not override hostname restrictions. Therefore select: Only allowed pages appear in the final crawl evidence. For this specific situation the expected proof is: Only allowed pages appear in the final crawl evidence.

Incorrect Answers

A:

This result applies to a different case: A basic directory brute-force wordlist causes rate limits and exceeds the test request budget. Automated enumeration must honor request limits and detection agreements. It does not establish the present requirement, where only allowed pages appear in the final crawl evidence. The relevant evidence is: Only allowed pages appear in the final crawl evidence.

B:

That approach concerns a different situation: an assessment needs an inventory of publicly accessible cloud buckets under the customer's account. Cloud access posture must be confirmed at both resource and data-plane levels. The required result is that only allowed pages appear in the final crawl evidence. The relevant evidence is: Only allowed pages appear in the final crawl evidence.

D:

It would address a cloud project exposes a service principal name but not evidence of its active privileges. The relevant reason in that case is: Identity existence alone does not determine effective cloud permission. Here the required success condition is only allowed pages appear in the final crawl evidence. The relevant evidence is: Only allowed pages appear in the final crawl evidence.

Question 678

A REST API silently processes unsupported HTTP methods as privileged operations. Which evidence most strongly validates the intended interpretation or control?

  1. Two synthetic users never receive each other's cached private content.
  2. A controlled special-character filename cannot invoke an extra command.
  3. An unauthorized method receives an appropriate rejection.
  4. A low-right test identity cannot retrieve another synthetic account's invoice.

Explanation

Correct Answer

C:

The source-based choice is an unauthorized method receives an appropriate rejection. Method confusion can expose operations not covered by UI controls. Evidence should show that an unauthorized method receives an appropriate rejection.

Incorrect Answers

A:

It would address a server presents user profile data from a shared cache keyed only by URL. The relevant reason in that case is: Cross-user cache leakage can bypass application-level access policy. Here the required success condition is an unauthorized method receives an appropriate rejection. The relevant evidence is: An unauthorized method receives an appropriate rejection.

B:

This result applies to a different case: A file-conversion service passes filenames directly to a system shell. Shell metacharacters can change command execution when inputs are concatenated. It does not establish the present requirement, where an unauthorized method receives an appropriate rejection. The relevant evidence is: An unauthorized method receives an appropriate rejection.

D:

That relates to a different issue: A user-controlled account ID in a billing API returns another synthetic customer's invoice. Guessing or changing object identifiers must not bypass ownership enforcement. That is not a direct remedy for the requested outcome: An unauthorized method receives an appropriate rejection. The relevant evidence is: An unauthorized method receives an appropriate rejection.

Question 679

A factory PLC accepts unauthenticated writes to process registers on a lab Modbus network. How should the analyst respond based on the described evidence and scope?

  1. Report register-manipulation exposure and require segmentation and authenticated control paths.
  2. Assess training-data leakage and apply model access and privacy controls.
  3. Use MobSF for static or approved dynamic mobile assessment.
  4. Identify prompt injection and enforce separation of retrieved content from trusted instructions.

Explanation

Correct Answer

A:

This matches the current authorized case: Report register-manipulation exposure and require segmentation and authenticated control paths. Legacy industrial protocols may not enforce message authorization. The observable criterion is a simulated unauthorized register write is blocked by the protective gateway.

Incorrect Answers

B:

It would address a model endpoint outputs confidential training examples when prompted with generic cues. The relevant reason in that case is: Model behavior can expose sensitive memorized data. Here the required success condition is a simulated unauthorized register write is blocked by the protective gateway. The appropriate action is: Report register-manipulation exposure and require segmentation and authenticated control paths.

C:

This action applies to a different case: A testing team uses Mobile Security Framework to inspect a permitted app package. Mobile-focused tooling identifies application configuration and code issues. It does not establish the present requirement, where a simulated unauthorized register write is blocked by the protective gateway. The appropriate action is: Report register-manipulation exposure and require segmentation and authenticated control paths.

D:

That approach concerns a different situation: an AI assistant retrieves an untrusted web page that contains instructions to send private documents. Untrusted source data must not gain authority over tool operations. The required result is that a simulated unauthorized register write is blocked by the protective gateway. The appropriate action is: Report register-manipulation exposure and require segmentation and authenticated control paths.

Question 680

An approved lab shows NTLM network authentication may be accepted without a plaintext password. What observation would best confirm the intended security outcome?

  1. Unsolicited test prompts cannot complete authentication without user-approved context.
  2. A revoked or wrong-audience synthetic token is rejected after remediation.
  3. The lab report distinguishes dictionary candidates from full keyspace search.
  4. The report identifies weak authentication design without collecting production hashes.

Explanation

Correct Answer

D:

The report identifies weak authentication design without collecting production hashes. This answer directly addresses the described constraint. Reusable password-derived authentication material can be abused in some NTLM flows. Successful validation requires: The report identifies weak authentication design without collecting production hashes.

Incorrect Answers

A:

That approach concerns a different situation: users receive repeated unsolicited MFA push prompts from an unknown source. Repeated prompts may coerce approval of an attacker-initiated sign-in. The required result is that the report identifies weak authentication design without collecting production hashes. The relevant evidence is: The report identifies weak authentication design without collecting production hashes.

B:

That relates to a different issue: A stolen application bearer token allows an API call without further challenge in a lab. Bearer tokens can authorize access for whoever possesses them. That is not a direct remedy for the requested outcome: The report identifies weak authentication design without collecting production hashes. The relevant evidence is: The report identifies weak authentication design without collecting production hashes.

C:

It would address a password audit tests a curated wordlist against approved offline synthetic hashes. The relevant reason in that case is: Dictionary attacks try likely words instead of exhaustive permutations. Here the required success condition is the report identifies weak authentication design without collecting production hashes. The relevant evidence is: The report identifies weak authentication design without collecting production hashes.