Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) 200-201 Practice Test 15
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.
Question 141
A tier-1 security analyst at the government application security team investigates during network tap coverage review: An inline IPS blocks a simulated malicious payload, but the incident team assumes a passive mirrored sensor would have blocked the same flow. Interpret the actual protocol evidence and avoid claiming absent payload or session state. The response must be scoped to the relevant identity, host and application, not a shared public address alone. Which targeted defensive analysis or remediation action most directly addresses the stated failure while honoring the constraints?
- Distinguish enforcement-capable inline IPS placement from passive out-of-band IDS monitoring.
- Treat the registry and process path as endpoint persistence artifacts and validate the spawned executable.
- Parse the scheme, authority, registrable domain, path and parameters before assessing link trust.
- Validate the affected component and actual exposure path before assigning its risk priority.
Explanation
Correct Answer
A:This action addresses the application ips placement issue in the government application security team, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: Inline policy drops the test flow while passive sensor only records it and cannot disrupt the connection. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
B:That action belongs to a different process registry linkage issue, such as: Endpoint telemetry shows a new registry Run key pointing to an unknown process executable, but analysts treat the key path as a network destination. It does not address the specific failure reported by the government application security team. The decisive acceptance condition for this case is: Inline policy drops the test flow while passive sensor only records it and cannot disrupt the connection.
C:That action belongs to a different url component interpretation issue, such as: A phishing link uses a trusted brand word inside a long path but the registrable domain belongs to an unknown site. It does not address the specific failure reported by the government application security team. The decisive acceptance condition for this case is: Inline policy drops the test flow while passive sensor only records it and cannot disrupt the connection.
D:That action belongs to a different vulnerability without exposure issue, such as: An internal library has a critical CVE but a SOC dashboard describes it as reachable directly from outside despite an enforced isolated network. It does not address the specific failure reported by the government application security team. The decisive acceptance condition for this case is: Inline policy drops the test flow while passive sensor only records it and cannot disrupt the connection.
Question 142
An incident at the online enrollment service is escalated to a host incident responder after scheduled SOC detection audit reveals: Two analysts transfer a forensic disk image with no baseline checksum and cannot prove that the copy matches its source. Do not expand containment or investigative access to unrelated tenants or systems. The analyst can capture a synthetic event in a segregated lab but cannot access unrelated customer payloads. An independent data owner and the recovery coordinator will review the negative containment test as separate approvers, while the forensic custodian records transfer timestamps and integrity hashes without editing the original evidence. Which targeted defensive analysis or remediation action most directly addresses the stated failure while honoring the constraints?
- Compute and record approved cryptographic digests for the source and each evidence copy with handling metadata.
- Isolate the affected endpoint through a tested scoped method, preserving critical approved services and forensic evidence.
- Group alternatives within the intended event-field constraints and test with negative examples.
- Record the missed detected-condition as a false negative and review sensor placement and rule coverage.
Explanation
Correct Answer
A:This action addresses the evidence integrity hashing issue in the online enrollment service, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The copied image hash matches its original reference digest after transfer. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
B:That action belongs to a different containment with continuity issue, such as: A compromised workstation is discovered in a production control network, and the team proposes shutting down the entire facility without confirming dependencies. It does not address the specific failure reported by the online enrollment service. The decisive acceptance condition for this case is: The copied image hash matches its original reference digest after transfer.
C:That action belongs to a different regex grouping alternation issue, such as: A detection rule intended to match either admin or root login errors allows root in unrelated log fields due to ungrouped alternation. It does not address the specific failure reported by the online enrollment service. The decisive acceptance condition for this case is: The copied image hash matches its original reference digest after transfer.
D:That action belongs to a different false negative classification issue, such as: A validated controlled malicious network pattern passes the sensor without any alert, despite the signature policy supposedly covering it. It does not address the specific failure reported by the online enrollment service. The decisive acceptance condition for this case is: The copied image hash matches its original reference digest after transfer.
Question 143
After the network protocol analyst at the enterprise mail filtering gateway applies this approved action — Correlate Windows Security logon events with account, logon type, source system and timestamp. — the original issue is revisited: A SOC investigates repeated interactive sign-in failures using only generic application health logs and misses security audit events. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- The altered sample is distinguished from the original without relying on filename or file extension.
- The approved investigator can retrieve the file while unrelated ticket readers cannot.
- The analyst reconstructs the failed sign-ins with correct identities and event ordering.
- Authorized login succeeds after the failing node is isolated, without changing accounts or releasing confidential logs.
Explanation
Correct Answer
C:This outcome is the direct verification of the approved action: Correlate Windows Security logon events with account, logon type, source system and timestamp. 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 cryptographic hash comparison issue and the corrective action Compare the computed file hash to the trusted approved digest and preserve the suspect copy for investigation. It cannot confirm the enterprise mail filtering gateway control. Required evidence for the current investigation is: The analyst reconstructs the failed sign-ins with correct identities and event ordering.
B:This observation validates another intellectual property leakage issue and the corrective action Classify the archive as protected intellectual property and use authorized restricted evidence storage. It cannot confirm the enterprise mail filtering gateway control. Required evidence for the current investigation is: The analyst reconstructs the failed sign-ins with correct identities and event ordering.
D:This observation validates another availability of authentication issue and the corrective action Remove unhealthy endpoints using real application health probes and restore a redundant authentication service path. It cannot confirm the enterprise mail filtering gateway control. Required evidence for the current investigation is: The analyst reconstructs the failed sign-ins with correct identities and event ordering.
Question 144
After the threat intelligence analyst at the telemedicine portal applies this approved action — Attribute the event to the network IDS sensor and validate the signature with supporting packet or flow context. — the original issue is revisited: A log shows a signature ID, sensor interface, packet direction and alert classification, but an analyst labels it a confirmed endpoint antivirus detection. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- The incident record identifies the network IDS source without inventing endpoint execution telemetry.
- The case correctly concludes the TCP connection was rejected rather than established.
- The analysis keeps base severity comparable while environmental priority distinguishes the critical hospital service.
- Untrusted recursive queries are refused and reflected response amplification is absent in test traffic.
Explanation
Correct Answer
A:This outcome is the direct verification of the approved action: Attribute the event to the network IDS sensor and validate the signature with supporting packet or flow 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
B:This observation validates another tcp flags interpretation issue and the corrective action Distinguish SYN, SYN-ACK, ACK, FIN and RST states when evaluating connection establishment. It cannot confirm the telemedicine portal control. Required evidence for the current investigation is: The incident record identifies the network IDS source without inventing endpoint execution telemetry.
C:This observation validates another cvss environmental metrics issue and the corrective action Adjust environmental impact and business-specific requirements according to the affected asset context. It cannot confirm the telemedicine portal control. Required evidence for the current investigation is: The incident record identifies the network IDS source without inventing endpoint execution telemetry.
D:This observation validates another dns amplification evidence issue and the corrective action Restrict recursive resolver access and correlate query-to-response size asymmetry with suspected reflection activity. It cannot confirm the telemedicine portal control. Required evidence for the current investigation is: The incident record identifies the network IDS source without inventing endpoint execution telemetry.
Question 145
An incident at the vendor access management console is escalated to a forensic evidence custodian after incident-response triage reveals: A report claims that selecting a certificate filename alone proves a forward-secret key exchange occurred. Correlate network records to the correct identity and time without revealing unrelated customers. A peer reviewer requires the final verdict to cite a direct observation rather than a vendor product label. Which targeted defensive analysis or remediation action most directly addresses the stated failure while honoring the constraints?
- Use parameterized statements and server-side input validation instead of building SQL command strings from request data.
- Inspect the negotiated key-exchange mechanism and protocol transcript rather than inferring the mode from the certificate.
- Apply the approved owner-managed discretionary access control model for the nonclassified collaboration folder.
- Use TCP sequence-based stream reassembly and exclude duplicate retransmissions when reconstructing the object.
Explanation
Correct Answer
B:This action addresses the key-exchange evidence issue in the vendor access management console, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The connection metadata shows the expected supported ephemeral key exchange and certificate authentication. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A:That action belongs to a different sql injection recognition issue, such as: A web query concatenates untrusted search text into SQL, and logs show a benign test payload changing the intended predicate. It does not address the specific failure reported by the vendor access management console. The decisive acceptance condition for this case is: The connection metadata shows the expected supported ephemeral key exchange and certificate authentication.
C:That action belongs to a different discretionary ownership issue, such as: A file owner is permitted to share their research folder and a central admin assumes this is a mandatory classification label. It does not address the specific failure reported by the vendor access management console. The decisive acceptance condition for this case is: The connection metadata shows the expected supported ephemeral key exchange and certificate authentication.
D:That action belongs to a different out-of-order tcp handling issue, such as: A packet trace contains retransmissions and out-of-order segments, and the exported text contains duplicated characters. It does not address the specific failure reported by the vendor access management console. The decisive acceptance condition for this case is: The connection metadata shows the expected supported ephemeral key exchange and certificate authentication.
Question 146
After the network detection engineer at the medical claims application applies this approved action — Correlate TCP sequence and acknowledgment information to distinguish retransmission from a new application action. — the original issue is revisited: A data packet appears twice with the same sequence number after a loss event, and the SOC counts it as two separate exfiltration commands. 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.
- No credential is entered at the imitation portal and the suspicious message is preserved for investigation.
- The test encrypted attachment receives the policy verdict instead of a false clean status.
- Reconstructed session analysis counts the payload once and retains the retransmission as transport evidence.
Explanation
Correct Answer
D:This outcome is the direct verification of the approved action: Correlate TCP sequence and acknowledgment information to distinguish retransmission from a new application action. 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 medical claims application control. Required evidence for the current investigation is: Reconstructed session analysis counts the payload once and retains the retransmission as transport evidence.
B:This observation validates another credential phishing verification issue and the corrective action Verify the request through an established independent channel and report the lookalike login link under the phishing procedure. It cannot confirm the medical claims application control. Required evidence for the current investigation is: Reconstructed session analysis counts the payload once and retains the retransmission as transport evidence.
C:This observation validates another encrypted archive evasion issue and the corrective action Apply policy-based handling for encrypted attachments and permitted sandbox or user verification procedures. It cannot confirm the medical claims application control. Required evidence for the current investigation is: Reconstructed session analysis counts the payload once and retains the retransmission as transport evidence.
Question 147
After the incident commander at the telemedicine portal applies this approved action — Apply encryption for confidentiality and a verifiable signature for origin and integrity according to separate requirements. — the original issue is revisited: A file is digitally signed but still readable by everyone, while the team claims that signatures alone encrypt its contents. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- The verdict documents the benign administrative command and the corrected alert classification.
- An unauthorized reader cannot view the encrypted file and an approved verifier detects tampering.
- The authorized jump host connects while a guest-VLAN test source is refused and logged.
- The approved investigator can retrieve the file while unrelated ticket readers cannot.
Explanation
Correct Answer
B:This outcome is the direct verification of the approved action: Apply encryption for confidentiality and a verifiable signature for origin and integrity according to separate requirements. 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 alert data validation issue and the corrective action Trace the triggering detection rule and examine underlying records before classifying the alert as malicious. It cannot confirm the telemedicine portal control. Required evidence for the current investigation is: An unauthorized reader cannot view the encrypted file and an approved verifier detects tampering.
C:This observation validates another host firewall inbound application issue and the corrective action Limit the host firewall rule to the jump-host source and expected management port with auditing enabled. It cannot confirm the telemedicine portal control. Required evidence for the current investigation is: An unauthorized reader cannot view the encrypted file and an approved verifier detects tampering.
D:This observation validates another intellectual property leakage issue and the corrective action Classify the archive as protected intellectual property and use authorized restricted evidence storage. It cannot confirm the telemedicine portal control. Required evidence for the current investigation is: An unauthorized reader cannot view the encrypted file and an approved verifier detects tampering.
Question 148
An incident at the branch DNS resolver network is escalated to a SOC investigation lead after endpoint isolation rehearsal reveals: A browser displays a certificate warning because a backend serves a self-signed leaf where clients expect a trusted CA chain. Correlate network records to the correct identity and time without revealing unrelated customers. 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?
- Isolate the affected host under the response playbook and correlate file changes with process and network events.
- Enforce runtime container least privilege and admission controls instead of treating image scanning as complete runtime security.
- Treat the registry and process path as endpoint persistence artifacts and validate the spawned executable.
- Deploy the correct identity-matching leaf and intermediate CA chain and validate trust path and hostname.
Explanation
Correct Answer
D:This action addresses the tls trust-chain validation issue in the branch DNS resolver network, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: A verified client completes TLS without trust warnings while a fake self-signed endpoint remains untrusted. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A:That action belongs to a different ransomware behavioral signal issue, such as: An endpoint spawns a script that rapidly renames hundreds of files and contacts an unfamiliar management domain. It does not address the specific failure reported by the branch DNS resolver network. The decisive acceptance condition for this case is: A verified client completes TLS without trust warnings while a fake self-signed endpoint remains untrusted.
B:That action belongs to a different container security context issue, such as: A container image is scanned as clean but its production pod runs privileged with a writable host filesystem mount. It does not address the specific failure reported by the branch DNS resolver network. The decisive acceptance condition for this case is: A verified client completes TLS without trust warnings while a fake self-signed endpoint remains untrusted.
C:That action belongs to a different process registry linkage issue, such as: Endpoint telemetry shows a new registry Run key pointing to an unknown process executable, but analysts treat the key path as a network destination. It does not address the specific failure reported by the branch DNS resolver network. The decisive acceptance condition for this case is: A verified client completes TLS without trust warnings while a fake self-signed endpoint remains untrusted.
Question 149
After the network protocol analyst at the central evidence preservation service applies this approved action — Use a collision-resistant digest appropriate to the integrity requirement and document the algorithm and handling procedures. — the original issue is revisited: An analyst treats an MD5 match as absolute proof of file authenticity for a high-assurance chain-of-custody requirement. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- The exact modifying process and effective identity are identified from attributable audit events.
- The case diagram correctly assigns external infrastructure, malicious capability and targeted victim without inventing actor identity.
- The evidence manifest records approved cryptographic hashes and validates the same content after transfer.
- The triage queue reflects observed business impact and documents confidence in each verdict.
Explanation
Correct Answer
C:This outcome is the direct verification of the approved action: Use a collision-resistant digest appropriate to the integrity requirement and document the algorithm and handling procedures. 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 linux audit process escalation issue and the corrective action Use auditd or equivalent authorized privileged operation records to link file write, effective user and executable. It cannot confirm the central evidence preservation service control. Required evidence for the current investigation is: The evidence manifest records approved cryptographic hashes and validates the same content after transfer.
B: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 central evidence preservation service control. Required evidence for the current investigation is: The evidence manifest records approved cryptographic hashes and validates the same content after transfer.
D:This observation validates another impact versus severity issue and the corrective action Evaluate actual asset criticality, confirmed impact and exposure instead of using signature severity as the incident priority alone. It cannot confirm the central evidence preservation service control. Required evidence for the current investigation is: The evidence manifest records approved cryptographic hashes and validates the same content after transfer.
Question 150
After the forensic evidence custodian at the software deployment pipeline applies this approved action — Correlate Windows Security logon events with account, logon type, source system and timestamp. — the original issue is revisited: A SOC investigates repeated interactive sign-in failures using only generic application health logs and misses security audit events. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- A harmless approved test marker receives the expected alert with current definition timestamps.
- The incident record identifies the exact failing HTTP operation without guessing from port 443.
- The analyst reconstructs the failed sign-ins with correct identities and event ordering.
- The unauthorized scheduled upload is linked to its actual task while approved jobs remain distinct.
Explanation
Correct Answer
C:This outcome is the direct verification of the approved action: Correlate Windows Security logon events with account, logon type, source system and timestamp. It proves the corrective or detection objective through observed evidence, not simply because a rule was saved or an alarm was acknowledged. The relevant condition in this case is: After the forensic evidence custodian at the software deployment pipeline applies this approved action — Correlate Windows Security logon events with account, logon type, source system and timestamp. — the original issue is revisited: A SOC investigates repeated….
Incorrect Answers
A:This observation validates another antivirus signature limitations issue and the corrective action Restore trusted signature update connectivity and verify the endpoint malware engine and protection status. It cannot confirm the software deployment pipeline control. Required evidence for the current investigation is: The analyst reconstructs the failed sign-ins with correct identities and event ordering.
B:This observation validates another transaction data for http issue and the corrective action Use permitted reverse proxy or application transaction logs to correlate URI, response status and request ID. It cannot confirm the software deployment pipeline control. Required evidence for the current investigation is: The analyst reconstructs the failed sign-ins with correct identities and event ordering.
D:This observation validates another scheduled task profile issue and the corrective action Review task registration, executable path, owner and run history against approved task inventory. It cannot confirm the software deployment pipeline control. Required evidence for the current investigation is: The analyst reconstructs the failed sign-ins with correct identities and event ordering.