Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) 200-201 Practice Test 14
Question 130
During scheduled SOC detection audit, the telecom customer identity platform reports this evidence to a forensic evidence custodian: A production firewall's effective policy differs from the approved configuration repository after a manual emergency edit. Protect regulated information and retain a tested service recovery path. Two log sources use different time representations; the reviewer must preserve provenance when correlating them. Which targeted defensive analysis or remediation action most directly addresses the stated failure while honoring the constraints?
- Review task registration, executable path, owner and run history against approved task inventory.
- Detect and document configuration drift and apply the authorized baseline correction with tested rollback.
- Evaluate the required resource, subject, device and environmental attributes within the authorization policy.
- Use permitted web-category and URL filtering event data to identify blocked malicious destinations.
Explanation
Correct Answer
B:This action addresses the configuration baseline drift issue in the telecom customer identity platform, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: Postchange comparison matches the approved rules and an unauthorized deviation produces an alert. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A:That action belongs to a different scheduled task profile issue, such as: An endpoint runs an unknown scheduled task nightly and the team attributes its network uploads to ordinary user browser activity. It does not address the specific failure reported by the telecom customer identity platform. The decisive acceptance condition for this case is: Postchange comparison matches the approved rules and an unauthorized deviation produces an alert.
C:That action belongs to a different attribute-based access issue, such as: A contractor may access a case only if device compliance, employment status and case sensitivity meet policy, but static roles ignore these factors. It does not address the specific failure reported by the telecom customer identity platform. The decisive acceptance condition for this case is: Postchange comparison matches the approved rules and an unauthorized deviation produces an alert.
D:That action belongs to a different web content filter context issue, such as: A browser reaches known phishing pages over HTTPS yet analysts monitor only endpoint infection alerts after the fact. It does not address the specific failure reported by the telecom customer identity platform. The decisive acceptance condition for this case is: Postchange comparison matches the approved rules and an unauthorized deviation produces an alert.
Question 131
An incident at the public-sector records application is escalated to a incident commander after forensic evidence quality assessment reveals: A packet trace contains retransmissions and out-of-order segments, and the exported text contains duplicated characters. Do not reclassify a detection as malicious solely from a signature identifier. A limited change window is approved, with a prechange reference, a tested rollback and a negative control action. Which targeted defensive analysis or remediation action most directly addresses the stated failure while honoring the constraints?
- Aggregate flow-byte counters over a normalized observation interval to calculate throughput trends.
- Limit the host firewall rule to the jump-host source and expected management port with auditing enabled.
- Verify the release signature or approved hash and replace the modified artifact from a trusted build provenance record.
- Use TCP sequence-based stream reassembly and exclude duplicate retransmissions when reconstructing the object.
Explanation
Correct Answer
D:This action addresses the out-of-order tcp handling issue in the public-sector records application, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The exported stream matches the expected byte sequence despite out-of-order delivery. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A:That action belongs to a different throughput over time issue, such as: The network reports a sudden rise in transferred bytes but an analyst samples one packet and assumes the sample proves aggregate volume. It does not address the specific failure reported by the public-sector records application. The decisive acceptance condition for this case is: The exported stream matches the expected byte sequence despite out-of-order delivery.
B:That action belongs to a different host firewall inbound application issue, such as: A Windows management service is accessible from a guest VLAN even though remote support must originate from a designated jump host. It does not address the specific failure reported by the public-sector records application. The decisive acceptance condition for this case is: The exported stream matches the expected byte sequence despite out-of-order delivery.
C:That action belongs to a different integrity of update files issue, such as: A deployment artifact keeps its filename and remains downloadable, but an unapproved binary modification changes its trusted digest. It does not address the specific failure reported by the public-sector records application. The decisive acceptance condition for this case is: The exported stream matches the expected byte sequence despite out-of-order delivery.
Question 132
During scheduled SOC detection audit, the municipal cyber defense office reports this evidence to a forensic evidence custodian: A sudden spike in outbound DNS NXDOMAIN answers is hidden by normal daily query volume on a busy resolver. Preserve authorized business traffic during monitoring and test with harmless controlled indicators. The analyst must identify what the evidence does not prove and avoid inferring a new compromise from a generic alert. Which targeted defensive analysis or remediation action most directly addresses the stated failure while honoring the constraints?
- Use sanctioned application classification and control policy events for the prohibited application.
- Record dropped-file paths and hashes and connect child processes to the detonated parent sample.
- Conduct a postincident review and assign specific corrective actions with owners and due dates.
- Aggregate query outcome ratios in short windows and compare to same-service historical baselines.
Explanation
Correct Answer
D:This action addresses the statistical anomaly aggregation issue in the municipal cyber defense office, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The anomalous NXDOMAIN ratio triggers a test alert while regular operating periods remain within bounds. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A:That action belongs to a different application visibility control issue, such as: A business policy prohibits a remote administration application but host firewall logs identify only generic TCP connections. It does not address the specific failure reported by the municipal cyber defense office. The decisive acceptance condition for this case is: The anomalous NXDOMAIN ratio triggers a test alert while regular operating periods remain within bounds.
B:That action belongs to a different sandbox dropped files issue, such as: A test executable writes a second binary and spawns it, but the analyst documents only the original file hash. It does not address the specific failure reported by the municipal cyber defense office. The decisive acceptance condition for this case is: The anomalous NXDOMAIN ratio triggers a test alert while regular operating periods remain within bounds.
C:That action belongs to a different lessons learned improvement issue, such as: After an incident closes, the same alert-triage delay repeats because no one records gaps or updates the runbook. It does not address the specific failure reported by the municipal cyber defense office. The decisive acceptance condition for this case is: The anomalous NXDOMAIN ratio triggers a test alert while regular operating periods remain within bounds.
Question 133
After the cloud audit engineer at the online enrollment service applies this approved action — Correlate and normalize events in the SIEM, then invoke an approved auditable SOAR playbook for the authorized containment step. — the original issue is revisited: A responder expects a log indexing rule to revoke a compromised user token automatically, without any response workflow or approval checkpoint. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- The exposed regulated service receives documented earlier remediation without misclassifying the lower-impact asset.
- The event sequence aligns correctly across both logs and preserves original timestamps for audit.
- A harmless oversized field is rejected and the service no longer crashes in controlled regression testing.
- The incident is correlated once and only the approved playbook revokes a test token with a recorded decision.
Explanation
Correct Answer
D:This outcome is the direct verification of the approved action: Correlate and normalize events in the SIEM, then invoke an approved auditable SOAR playbook for the authorized containment step. It proves the corrective or detection objective through observed evidence, not simply because a rule was saved or an alarm was acknowledged.
Incorrect Answers
A:This observation validates another risk prioritization issue and the corrective action Score remediation priority using asset value, exposure, likelihood and business impact instead of technical severity alone. It cannot confirm the online enrollment service control. Required evidence for the current investigation is: The incident is correlated once and only the approved playbook revokes a test token with a recorded decision.
B:This observation validates another log timestamp normalization issue and the corrective action Normalize source timestamps to a common reference while retaining original timezone and clock-skew context. It cannot confirm the online enrollment service control. Required evidence for the current investigation is: The incident is correlated once and only the approved playbook revokes a test token with a recorded decision.
C:This observation validates another buffer overrun symptoms issue and the corrective action Validate bounds handling and deploy a tested supported patch for the affected parser, retaining crash evidence. It cannot confirm the online enrollment service control. Required evidence for the current investigation is: The incident is correlated once and only the approved playbook revokes a test token with a recorded decision.
Question 134
After the threat intelligence analyst at the multi-tenant hosting provider applies this approved action — Restrict recursive resolver access and correlate query-to-response size asymmetry with suspected reflection activity. — the original issue is revisited: A resolver receives short queries and emits unusually large responses toward spoofed victim addresses while recursion is open publicly. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- Untrusted recursive queries are refused and reflected response amplification is absent in test traffic.
- The service authenticates successfully and an unprivileged web request cannot retrieve the private key bundle.
- The worksheet reflects preexisting administrator authority and cites the verified prerequisite.
- The evidence log contains a timestamped volatile-state capture and subsequent preserved disk evidence.
Explanation
Correct Answer
A:This outcome is the direct verification of the approved action: Restrict recursive resolver access and correlate query-to-response size asymmetry with suspected reflection activity. It proves the corrective or detection objective through observed evidence, not simply because a rule was saved or an alarm was acknowledged.
Incorrect Answers
B:This observation validates another pkcs key storage issue and the corrective action Store private-key PKCS bundles in an encrypted secret store with restricted process access and publish only approved public certificate material. It cannot confirm the multi-tenant hosting provider control. Required evidence for the current investigation is: Untrusted recursive queries are refused and reflected response amplification is absent in test traffic.
C:This observation validates another cvss privileges required issue and the corrective action Set privileges required based on the authority the attacker needs before exploitation rather than after compromise. It cannot confirm the multi-tenant hosting provider control. Required evidence for the current investigation is: Untrusted recursive queries are refused and reflected response amplification is absent in test traffic.
D:This observation validates another volatile memory priority issue and the corrective action Evaluate safety and legal constraints, then capture priority volatile information before shutdown when feasible. It cannot confirm the multi-tenant hosting provider control. Required evidence for the current investigation is: Untrusted recursive queries are refused and reflected response amplification is absent in test traffic.
Question 135
After the threat intelligence analyst at the regional payments SOC applies this approved action — Read DNS response codes and answer records with the query ID and authoritative context. — the original issue is revisited: A client repeatedly receives NXDOMAIN for a newly registered service and a report calls it a successful resolution. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- The test matches four-digit values but rejects alphabetic or differently sized identifiers.
- The analyst report ties each identified capability to a specific observed artifact and labels remaining uncertainty.
- The anomalous NXDOMAIN ratio triggers a test alert while regular operating periods remain within bounds.
- The analyst distinguishes successful A/AAAA responses from NXDOMAIN errors with timestamped evidence.
Explanation
Correct Answer
D:This outcome is the direct verification of the approved action: Read DNS response codes and answer records with the query ID and authoritative context. It proves the corrective or detection objective through observed evidence, not simply because a rule was saved or an alarm was acknowledged.
Incorrect Answers
A:This observation validates another regex digit quantifier issue and the corrective action Use a digit class and explicit repetition count for the intended four-character numeric identifier. It cannot confirm the regional payments SOC control. Required evidence for the current investigation is: The analyst distinguishes successful A/AAAA responses from NXDOMAIN errors with timestamped evidence.
B:This observation validates another reverse engineering assessment issue and the corrective action Analyze the sample's permitted static strings and controlled behavioral evidence before inferring its functions. It cannot confirm the regional payments SOC control. Required evidence for the current investigation is: The analyst distinguishes successful A/AAAA responses from NXDOMAIN errors with timestamped evidence.
C:This observation validates another statistical anomaly aggregation issue and the corrective action Aggregate query outcome ratios in short windows and compare to same-service historical baselines. It cannot confirm the regional payments SOC control. Required evidence for the current investigation is: The analyst distinguishes successful A/AAAA responses from NXDOMAIN errors with timestamped evidence.
Question 136
After the vulnerability management analyst at the multi-tenant hosting provider applies this approved action — Correlate web access URI, method, response status, user agent and source metadata in a bounded incident window. — the original issue is revisited: A suspected abuse report relies on host CPU spikes without examining which URLs and HTTP statuses were returned to the remote client. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- The request sequence and resulting statuses are reconstructable from the retained application logs.
- The event sequence aligns correctly across both logs and preserves original timestamps for audit.
- The quality report documents the missed positive and retesting produces the intended detection.
- The case diagram correctly assigns external infrastructure, malicious capability and targeted victim without inventing actor identity.
Explanation
Correct Answer
A:This outcome is the direct verification of the approved action: Correlate web access URI, method, response status, user agent and source metadata in a bounded incident window. It proves the corrective or detection objective through observed evidence, not simply because a rule was saved or an alarm was acknowledged.
Incorrect Answers
B:This observation validates another log timestamp normalization issue and the corrective action Normalize source timestamps to a common reference while retaining original timezone and clock-skew context. It cannot confirm the multi-tenant hosting provider control. Required evidence for the current investigation is: The request sequence and resulting statuses are reconstructable from the retained application logs.
C:This observation validates another false negative classification issue and the corrective action Record the missed detected-condition as a false negative and review sensor placement and rule coverage. It cannot confirm the multi-tenant hosting provider control. Required evidence for the current investigation is: The request sequence and resulting statuses are reconstructable from the retained application logs.
D:This observation validates another diamond model victim infrastructure issue and the corrective action Map adversary, infrastructure, capability and victim vertices separately using available evidence. It cannot confirm the multi-tenant hosting provider control. Required evidence for the current investigation is: The request sequence and resulting statuses are reconstructable from the retained application logs.
Question 137
After the threat intelligence analyst at the multinational manufacturing network applies this approved action — Form a testable hypothesis about abnormal sign-in reuse, identify supporting log sources and document a bounded hunt query. — the original issue is revisited: A proactive hunter starts a random search across all log fields and cannot say what evidence would confirm credential replay. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- A harmless injection probe is blocked and legitimate API traffic remains functional with an attributable request log.
- The next simulated alert has usable logs and a documented owner before any real incident occurs.
- Return traffic for the approved session passes while unsolicited inbound connections remain denied.
- The hunt produces reproducible candidate sessions with criteria that distinguish them from normal administrator activity.
Explanation
Correct Answer
D:This outcome is the direct verification of the approved action: Form a testable hypothesis about abnormal sign-in reuse, identify supporting log sources and document a bounded hunt query. It proves the corrective or detection objective through observed evidence, not simply because a rule was saved or an alarm was acknowledged.
Incorrect Answers
A:This observation validates another application security instrumentation issue and the corrective action Add application-layer input validation and supported WAF logging scoped to the API attack surface. It cannot confirm the multinational manufacturing network control. Required evidence for the current investigation is: The hunt produces reproducible candidate sessions with criteria that distinguish them from normal administrator activity.
B:This observation validates another preparation asset coverage issue and the corrective action During preparation, register the asset, establish telemetry and rehearse an authorized response route. It cannot confirm the multinational manufacturing network control. Required evidence for the current investigation is: The hunt produces reproducible candidate sessions with criteria that distinguish them from normal administrator activity.
C:This observation validates another stateful firewall session tracking issue and the corrective action Apply the approved stateful session policy so response packets are associated with an established authorized connection. It cannot confirm the multinational manufacturing network control. Required evidence for the current investigation is: The hunt produces reproducible candidate sessions with criteria that distinguish them from normal administrator activity.
Question 138
After the cloud audit engineer at the merchant checkout web service applies this approved action — Treat Tor exit nodes as egress infrastructure and seek authenticated identity and host evidence for attribution. — the original issue is revisited: A remote login originates from a Tor exit node, and the SOC claims that IP uniquely identifies the operator's home device. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- A compliant TLS client connects while an obsolete-version-only test handshake is rejected.
- The report captures the exit indicator without asserting unsupported real-world user identity.
- The dashboard shows separate verified threat-control and business-restoration timestamps.
- An internal malicious test yields an actionable endpoint or identity alert even with permitted network access.
Explanation
Correct Answer
B:This outcome is the direct verification of the approved action: Treat Tor exit nodes as egress infrastructure and seek authenticated identity and host evidence for attribution. It proves the corrective or detection objective through observed evidence, not simply because a rule was saved or an alarm was acknowledged.
Incorrect Answers
A:This observation validates another tls version negotiation issue and the corrective action Enforce the supported minimum TLS protocol version with a deliberate compatibility and rollback test. It cannot confirm the merchant checkout web service control. Required evidence for the current investigation is: The report captures the exit indicator without asserting unsupported real-world user identity.
C:This observation validates another mean time to control issue and the corrective action Track the verified control of the threat and restoration outcomes as distinct event milestones. It cannot confirm the merchant checkout web service control. Required evidence for the current investigation is: The report captures the exit indicator without asserting unsupported real-world user identity.
D:This observation validates another defense-in-depth logging issue and the corrective action Combine endpoint audit logs and identity behavior analytics with existing network enforcement and central correlation. It cannot confirm the merchant checkout web service control. Required evidence for the current investigation is: The report captures the exit indicator without asserting unsupported real-world user identity.
Question 139
During incident-response triage, the enterprise mail filtering gateway reports this evidence to a incident commander: A backend server sees only the proxy address in every request and the SOC labels the proxy as the abusive end user. Preserve authorized business traffic during monitoring and test with harmless controlled indicators. Two log sources use different time representations; the reviewer must preserve provenance when correlating them. This alternate observation is collected from a second routed segment with different sensor coverage and timestamped NAT mappings; preserve raw flow direction and explicitly label whether application data or only transport metadata was available. Which targeted defensive analysis or remediation action most directly addresses the stated failure while honoring the constraints?
- Apply encryption for confidentiality and a verifiable signature for origin and integrity according to separate requirements.
- Correlate load balancer request IDs and trusted forwarded-client fields with backend and edge logs.
- Correlate logon type, account purpose, source device and approved access policy in server profiling.
- Map identity provider event outcomes and failure reasons into consistent SIEM logon categories.
Explanation
Correct Answer
B:This action addresses the load balancer source rewriting issue in the enterprise mail filtering gateway, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: A test request maps to its true originating client while untrusted spoofed forwarding headers are rejected. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A:That action belongs to a different asymmetric signatures versus secrecy issue, such as: A file is digitally signed but still readable by everyone, while the team claims that signatures alone encrypt its contents. It does not address the specific failure reported by the enterprise mail filtering gateway. The decisive acceptance condition for this case is: A test request maps to its true originating client while untrusted spoofed forwarding headers are rejected.
C:That action belongs to a different service account login anomalies issue, such as: A noninteractive backup service account is suddenly used for an interactive remote desktop login from an unfamiliar workstation. It does not address the specific failure reported by the enterprise mail filtering gateway. The decisive acceptance condition for this case is: A test request maps to its true originating client while untrusted spoofed forwarding headers are rejected.
D:That action belongs to a different authentication status codes issue, such as: A sign-in dashboard counts successful and failed logins as identical because its normalized event mapping omits outcome fields. It does not address the specific failure reported by the enterprise mail filtering gateway. The decisive acceptance condition for this case is: A test request maps to its true originating client while untrusted spoofed forwarding headers are rejected.
Question 140
An incident at the third-party partner exchange is escalated to a forensic evidence custodian after incident-response triage reveals: An incident dashboard reports a one-minute response based on alert creation, although the first analyst action occurred forty minutes later. Do not expand containment or investigative access to unrelated tenants or systems. Operations needs evidence that the proposed defense remains effective after a routine service restart. Which targeted defensive analysis or remediation action most directly addresses the stated failure while honoring the constraints?
- Measure the response interval using the documented alert and first meaningful response action timestamps.
- Profile connection duration and timing by application identity and investigate long-lived deviations.
- Escape the literal period in the hostname regex and verify word or field boundaries.
- Remove unnecessary public listeners and allow approved management access through restricted administrative paths.
Explanation
Correct Answer
A:This action addresses the mean time to respond issue in the third-party partner exchange, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The report reflects the actual analyst response interval and separates it from machine alert latency. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
B:That action belongs to a different session duration outlier issue, such as: A normal API call lasts seconds but a client maintains an unapproved outbound session for eight hours with intermittent small transfers. It does not address the specific failure reported by the third-party partner exchange. The decisive acceptance condition for this case is: The report reflects the actual analyst response interval and separates it from machine alert latency.
C:That action belongs to a different regex escaped dot issue, such as: A URL filter pattern uses an unescaped dot between hostname labels and accidentally matches unrelated characters. It does not address the specific failure reported by the third-party partner exchange. The decisive acceptance condition for this case is: The report reflects the actual analyst response interval and separates it from machine alert latency.
D:That action belongs to a different attack surface reduction issue, such as: A service publishes SSH, database, and HTTP ports publicly although customers only require HTTPS. It does not address the specific failure reported by the third-party partner exchange. The decisive acceptance condition for this case is: The report reflects the actual analyst response interval and separates it from machine alert latency.