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Last Update: Oct 24, 2026

CAS-005 Training Course: 180 Video Lectures

CAS-005 PDF Study Guide: 903 Pages

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CompTIA CAS-005 Practice Test 50

Question 490

Firewall and packet logs disagree because the observed address was translated at the boundary. Which control or decision MOST directly resolves the stated gap?

  1. Normalize identities through a verified mapping before cross-source joins.
  2. Correlate NAT mapping and observation locations before incident counts.
  3. Rebuild chronology using source timestamps and known clock offsets.
  4. Constrain time windows to a plausible attack chain and validate order.

Explanation

Correct Answer

B:

One flow can have several legitimate address representations. The controlling fact is: Firewall and packet logs disagree because the observed address was translated at the boundary.

Incorrect Answers

A:

Normalizing identities through a verified mapping would not correlate NAT mapping and observation locations.

C:

Delayed data can produce artificial bursts. The scenario does not present the alternate condition: an anomaly dashboard uses ingestion time rather than event time after a backlog flush. The proper immediate action is to correlate NAT mapping and observation locations before incident counts.

D:

Constrain time windows to a plausible attack chain and validate order would not correlate NAT mapping and observation locations.

Question 491

A storage control flags a customer export after approved legal disclosure. What is the appropriate security response for this scenario?

  1. Correlate job authorization, account and object scope before escalation.
  2. Distinguish attempted execution from confirmed process activity.
  3. Verify the legal workflow and data minimization before closing the alert.
  4. Correlate artifact signatures and deployment provenance.

Explanation

Correct Answer

C:

Authorized disclosure requires precise scope. The controlling fact is: A storage control flags a customer export after approved legal disclosure.

Incorrect Answers

A:

Transfer volume without context can resemble theft. Authorized disclosure requires precise scope.

B:

Prevention signals are not proof of compromise. Authorized disclosure requires precise scope.

D:

Change legitimacy requires verified linkage. Authorized disclosure requires precise scope.

Question 492

An alert threshold was raised to hide noise but genuine incidents are now missed. What should the enterprise security architect or analyst do NEXT?

  1. Tighten the pattern and retest benign and malicious examples.
  2. Repair telemetry coverage and test true-positive detection.
  3. Provide source evidence, entity context and reconstruction links.
  4. Evaluate precision and recall on representative datasets before tuning.

Explanation

Correct Answer

D:

Reducing event volume is not the same as effectiveness. The controlling fact is: An alert threshold was raised to hide noise but genuine incidents are now missed.

Incorrect Answers

A:

The reported condition calls for this action: Evaluate precision and recall on representative datasets before tuning.

B:

The current facts call for this action: evaluate precision and recall on representative datasets before tuning.

C:

Decision-ready alerts need inspectable support. The scenario does not present the alternate condition: a high-confidence alert includes no analyst link to supporting events. The proper immediate action is to evaluate precision and recall on representative datasets before tuning.

Question 493

A service identity moves from hourly to continuous usage with no approved change. Which action is MOST defensible given these facts?

  1. Inspect workloads, tokens and recent deployment records.
  2. Use destination, client and permitted-protocol context to validate risk.
  3. Compare behavior to approved work scope before invoking insider-risk procedures.
  4. Verify entitlement approval before recalibrating the baseline.

Explanation

Correct Answer

A:

Drift from stable service behavior may be meaningful. The controlling fact is: A service identity moves from hourly to continuous usage with no approved change.

Incorrect Answers

B:

The current facts call for this action: inspect workloads, tokens and recent deployment records.

C:

Anomaly detection needs business context. The scenario does not present the alternate condition: a finance employee downloads large files during a documented approved migration. The proper immediate action is to inspect workloads, tokens and recent deployment records.

D:

The reported condition calls for this action: Inspect workloads, tokens and recent deployment records.

Question 494

An external report references a credential dump but never identifies which organization was affected. Which action is the BEST response to the security requirement?

  1. Confirm current ownership, observations and independent evidence before blocking.
  2. Validate source relevance before triggering enterprise-wide response.
  3. Verify current effective policy and direct reachability.
  4. Resolve accurate asset and CPE versions before declaring exposure.

Explanation

Correct Answer

B:

Intelligence relevance must be established. The controlling fact is: An external report references a credential dump but never identifies which organization was affected.

Incorrect Answers

A:

Confirming current ownership, observations and independent evidence would not validate source relevance.

C:

Posture scanner limitations must be disclosed. The scenario does not present the alternate condition: a CSPM tool reports an exposed cloud resource but its scanner used an outdated read permission. The proper immediate action is to validate source relevance before triggering enterprise-wide response.

D:

Resolving accurate asset and CPE versions would not validate source relevance.

Question 495

Two cloud accounts use the same security account name but belong to different legal entities. Which control or decision MOST directly resolves the stated gap?

  1. Distinguish attempted access from successful object retrieval.
  2. Trace drift to IaC and fix the authoritative source.
  3. Use immutable account and workload identities during aggregation.
  4. Report the blind spot and repair authorized collection access.

Explanation

Correct Answer

C:

Name similarity can hide important ownership boundaries. The controlling fact is: Two cloud accounts use the same security account name but belong to different legal entities.

Incorrect Answers

A:

Distinguishing attempted access from successful object retrieval would not meet the need for immutable evidence retention.

B:

The current facts call for this action: use immutable account and workload identities during aggregation.

D:

Reporting the blind spot and repairing authorized collection access would not meet the need for immutable evidence retention.

Question 496

A high-confidence alert includes no analyst link to supporting events. Which action is the BEST response to the security requirement?

  1. Repair telemetry coverage and test true-positive detection.
  2. Evaluate precision and recall on representative datasets before tuning.
  3. Tighten the pattern and retest benign and malicious examples.
  4. Provide source evidence, entity context and reconstruction links.

Explanation

Correct Answer

D:

Decision-ready alerts need inspectable support. The controlling fact is: A high-confidence alert includes no analyst link to supporting events.

Incorrect Answers

A:

The reported condition calls for this action: Provide source evidence, entity context and reconstruction links.

B:

The current facts call for this action: provide source evidence, entity context and reconstruction links.

C:

Rule specificity affects false positives. The scenario does not present the alternate condition: a broad regex triggers on every normal administrative PowerShell script. The proper immediate action is to provide source evidence, entity context and reconstruction links.

Question 497

A cloud storage alert affects classified export data but its numeric score is lower than ordinary web noise. Which control or decision MOST directly resolves the stated gap?

  1. Escalate based on data sensitivity and plausible consequence.
  2. Resolve stable asset IDs and current accountability before dispatch.
  3. Prioritize by active exploitation and business impact rather than base score alone.
  4. Validate actual exposure and avoid treating storage as compromise.

Explanation

Correct Answer

A:

Asset type and classification influence prioritization. The controlling fact is: A cloud storage alert affects classified export data but its numeric score is lower than ordinary web noise.

Incorrect Answers

B:

The current facts call for this action: escalate based on data sensitivity and plausible consequence.

C:

Exposure and criticality can dominate nominal severity. The scenario does not present the alternate condition: a moderate CVSS vulnerability is being exploited on an internet-facing payroll authentication gateway. The proper immediate action is to escalate based on data sensitivity and plausible consequence.

D:

The reported condition calls for this action: Escalate based on data sensitivity and plausible consequence.

Question 498

A security analyst joins alerts across an entire day without testing event sequence requirements. What is the appropriate security response for this scenario?

  1. Normalize identities through a verified mapping before cross-source joins.
  2. Constrain time windows to a plausible attack chain and validate order.
  3. Correlate NAT mapping and observation locations before incident counts.
  4. Rebuild chronology using source timestamps and known clock offsets.

Explanation

Correct Answer

B:

Loose joins can combine unrelated activities into false incidents. The controlling fact is: A security analyst joins alerts across an entire day without testing event sequence requirements.

Incorrect Answers

A:

Normalizing identities through a verified mapping would not address the need for constrain time windows to a plausible attack chain and validate order.

C:

One flow can have several legitimate address representations. The scenario does not present the alternate condition: firewall and packet logs disagree because the observed address was translated at the boundary. The proper immediate action is to constrain time windows to a plausible attack chain and validate order.

D:

Rebuilding chronology using source timestamps and known clock offsets would not address the need for constrain time windows to a plausible attack chain and validate order.

Question 499

An audit display labels controls effective because owners have marked them installed. What should the enterprise security architect or analyst do NEXT?

  1. Report outcome measures such as detection and response latency by severity.
  2. Normalize asset identifiers and reconcile duplicated CVEs.
  3. Link effectiveness to test evidence, exceptions and time.
  4. Measure telemetry coverage by live and recovery environments.

Explanation

Correct Answer

C:

Deployment status does not guarantee a control works. The controlling fact is: An audit display labels controls effective because owners have marked them installed.

Incorrect Answers

A:

Reporting outcome measures such as detection and response latency by severity would not address the need for link effectiveness to test evidence, exceptions and time.

B:

The current facts call for this action: link effectiveness to test evidence, exceptions and time.

D:

Measuring telemetry coverage by live and recovery environments would not address the need for link effectiveness to test evidence, exceptions and time. Deployment status does not guarantee a control works.

Question 500

A CSPM tool reports an exposed cloud resource but its scanner used an outdated read permission. Which action is MOST defensible given these facts?

  1. Validate source relevance before triggering enterprise-wide response.
  2. Confirm current ownership, observations and independent evidence before blocking.
  3. Resolve accurate asset and CPE versions before declaring exposure.
  4. Verify current effective policy and direct reachability.

Explanation

Correct Answer

D:

Posture scanner limitations must be disclosed. The controlling fact is: A CSPM tool reports an exposed cloud resource but its scanner used an outdated read permission.

Incorrect Answers

A:

The reported condition calls for this action: Verify current effective policy and direct reachability.

B:

The current facts call for this action: verify current effective policy and direct reachability.

C:

Component identity determines whether an advisory applies. The scenario does not present the alternate condition: a vulnerability feed uses a product name that maps to several incompatible versions. The proper immediate action is to verify current effective policy and direct reachability.


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