Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) 200-201 Practice Test 25
Question 240
A identity monitoring analyst at the industrial safety monitoring enclave investigates during business continuity tabletop: A capture shows UDP destination 53, but an incident report incorrectly asserts that a TCP session was established. Interpret the actual protocol evidence and avoid claiming absent payload or session state. The team compares the result to a known-good baseline from another authorized system, and records the source clock offset. Which targeted defensive analysis or remediation action most directly addresses the stated failure while honoring the constraints?
- Classify a detected real-positive test condition as a true positive and record the supporting ground truth.
- Reconcile sandbox execution timestamps, DNS lookups and network captures before ordering the observed behaviors.
- Read the IP protocol and transport headers before labeling a conversation as UDP or TCP.
- Revoke device tokens and perform authorized selective wipe or device retirement under the mobile management policy.
Explanation
Correct Answer
C:This action addresses the protocol inference from headers issue in the industrial safety monitoring enclave, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The report correctly identifies the datagram conversation without inventing a three-way handshake. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A:That action belongs to a different true positive classification issue, such as: A detector alerts on a validated harmless attack simulation that is explicitly flagged as malicious test traffic. It does not address the specific failure reported by the industrial safety monitoring enclave. The decisive acceptance condition for this case is: The report correctly identifies the datagram conversation without inventing a three-way handshake.
B:That action belongs to a different sandbox network indicators issue, such as: A detonation report shows an executable making TLS connections to an unfamiliar domain after launch but the analyst claims the domain was contacted before execution. It does not address the specific failure reported by the industrial safety monitoring enclave. The decisive acceptance condition for this case is: The report correctly identifies the datagram conversation without inventing a three-way handshake.
D:That action belongs to a different mobile device offboarding issue, such as: A lost managed phone retains corporate mail tokens after a contractor's account is disabled, and the MDM record still shows active enrollment. It does not address the specific failure reported by the industrial safety monitoring enclave. The decisive acceptance condition for this case is: The report correctly identifies the datagram conversation without inventing a three-way handshake.
Question 241
A security monitoring architect at the regional payments SOC investigates during network tap coverage review: An administrator claims that a screen capture of a log viewer proves a raw event never existed, despite a complete authenticated log export. Preserve volatile artifacts and provenance without interrupting unrelated hosts. A second reviewer will compare the original rule, effective enforcement result and affected asset inventory. Which targeted defensive analysis or remediation action most directly addresses the stated failure while honoring the constraints?
- Create scoped host egress rules for the needed package endpoint and reject unapproved destinations.
- Enrich the indicators with confidence and observation context and prioritize matches to the organization's actual protected assets.
- Preserve the most direct authenticated original event record and its source metadata for the specific claim.
- Correlate load balancer request IDs and trusted forwarded-client fields with backend and edge logs.
Explanation
Correct Answer
C:This action addresses the best-evidence log source issue in the regional payments SOC, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The investigation can reproduce the disputed event from a validated source rather than relying only on a screenshot. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A:That action belongs to a different host firewall outbound scope issue, such as: A lab server needs to contact an approved package mirror but a blanket outbound allow also permits unknown remote-management destinations. It does not address the specific failure reported by the regional payments SOC. The decisive acceptance condition for this case is: The investigation can reproduce the disputed event from a validated source rather than relying only on a screenshot.
B:That action belongs to a different threat intelligence relevance issue, such as: A feed lists hundreds of malicious addresses but the analyst blocks all of them without checking age, confidence or local telemetry matches. It does not address the specific failure reported by the regional payments SOC. The decisive acceptance condition for this case is: The investigation can reproduce the disputed event from a validated source rather than relying only on a screenshot.
D:That action belongs to a different load balancer source rewriting issue, such as: A backend server sees only the proxy address in every request and the SOC labels the proxy as the abusive end user. It does not address the specific failure reported by the regional payments SOC. The decisive acceptance condition for this case is: The investigation can reproduce the disputed event from a validated source rather than relying only on a screenshot.
Question 242
The remote distribution branch detects an exception during monitoring baseline revision; its identity monitoring analyst confirms: A passive fiber tap produces complete packet copies, and a change proposal expects it to stop live traffic with an alert setting. Separate collector limitations from a real application or network failure before deciding. The event window is bounded by an original audit timestamp, a verified activity owner and the affected asset ID. Which targeted defensive analysis or remediation action most directly addresses the stated failure while honoring the constraints?
- Treat the tap as out-of-band observation and place enforcement only at a designed inline control point.
- Delimit packet-header visibility and obtain consented endpoint or legally authorized decryption evidence where applicable.
- Preserve the authorized full-packet test session and reconstruct the transaction with sensitive-content controls.
- Map both directional paths and adjust approved monitoring locations or correlate complementary sensors.
Explanation
Correct Answer
A:This action addresses the passive tap behavior issue in the remote distribution branch, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The injected safe alert appears in monitoring but production forwarding remains unaffected by the tap. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
B:That action belongs to a different encrypted deep inspection caveat issue, such as: A network DPI appliance sees only ciphertext for a TLS channel and its report claims to have read an unauthorized login password. It does not address the specific failure reported by the remote distribution branch. The decisive acceptance condition for this case is: The injected safe alert appears in monitoring but production forwarding remains unaffected by the tap.
C:That action belongs to a different full capture reconstruction issue, such as: Two parties dispute whether a test HTTP response contained a confidential string, while the analyst only has byte counters. It does not address the specific failure reported by the remote distribution branch. The decisive acceptance condition for this case is: The injected safe alert appears in monitoring but production forwarding remains unaffected by the tap.
D:That action belongs to a different asymmetric sensor placement issue, such as: One network path is tapped for detection but return traffic follows a separate gateway, leaving sessions incomplete in the capture. It does not address the specific failure reported by the remote distribution branch. The decisive acceptance condition for this case is: The injected safe alert appears in monitoring but production forwarding remains unaffected by the tap.
Question 243
After the SOC investigation lead at the insurance claims ingestion queue applies this approved action — Use auditd or equivalent authorized privileged operation records to link file write, effective user and executable. — the original issue is revisited: A privileged configuration file was altered and a shell session was active, but ownership is guessed from the machine's logged-in users list. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- The investigation can reproduce the disputed event from a validated source rather than relying only on a screenshot.
- The test export hides direct identifiers for unauthorized viewers while authorized support can use redacted diagnostics.
- The exact modifying process and effective identity are identified from attributable audit events.
- The test encrypted attachment receives the policy verdict instead of a false clean status.
Explanation
Correct Answer
C:This outcome is the direct verification of the approved action: Use auditd or equivalent authorized privileged operation records to link file write, effective user and executable. 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 SOC investigation lead at the insurance claims ingestion queue applies this approved action — Use auditd or equivalent authorized privileged operation records to link file write, effective user and executable. — the original issue is revisited: A privileged….
Incorrect Answers
A:This observation validates another best-evidence log source issue and the corrective action Preserve the most direct authenticated original event record and its source metadata for the specific claim. It cannot confirm the insurance claims ingestion queue control. Required evidence for the current investigation is: The exact modifying process and effective identity are identified from attributable audit events.
B:This observation validates another personal identifier classification issue and the corrective action Classify the fields as sensitive personal information and apply approved masking and access restrictions. It cannot confirm the insurance claims ingestion queue control. Required evidence for the current investigation is: The exact modifying process and effective identity are identified from attributable audit events.
D: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 insurance claims ingestion queue control. Required evidence for the current investigation is: The exact modifying process and effective identity are identified from attributable audit events.
Question 244
A network detection engineer at the regional datacenter operations investigates during network tap coverage review: A support ticket title is reflected into HTML without escaping, and a test browser executes a harmless injected script. Keep packet collection within the approved scope and do not assume encrypted payloads are readable. A second reviewer will compare the original rule, effective enforcement result and affected asset inventory. Which targeted defensive analysis or remediation action most directly addresses the stated failure while honoring the constraints?
- Validate enrollment destination through managed device workflows and treat the unsolicited code as an untrusted link.
- Profile connection duration and timing by application identity and investigate long-lived deviations.
- Apply output encoding for the exact HTML context and a defense-in-depth content security policy.
- Review user and system cron jobs and relevant journals, then remove the unauthorized task under incident controls.
Explanation
Correct Answer
C:This action addresses the cross-site scripting prevention issue in the regional datacenter operations, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The test text renders as inert characters and no script runs in the analyst browser. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A:That action belongs to a different qr-code lure issue, such as: A printed QR code outside a secure office sends staff to a fake device enrollment page while the domain differs from the company portal. It does not address the specific failure reported by the regional datacenter operations. The decisive acceptance condition for this case is: The test text renders as inert characters and no script runs in the analyst browser.
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 regional datacenter operations. The decisive acceptance condition for this case is: The test text renders as inert characters and no script runs in the analyst browser.
D:That action belongs to a different linux scheduled task persistence issue, such as: A temporary executable reappears every five minutes via a newly installed cron entry despite removal of the original process. It does not address the specific failure reported by the regional datacenter operations. The decisive acceptance condition for this case is: The test text renders as inert characters and no script runs in the analyst browser.
Question 245
After the vulnerability management analyst at the merchant checkout web service applies this approved action — Inspect authorized registry run locations and startup artifacts, preserving evidence before removing unauthorized entries. — the original issue is revisited: A suspicious executable is stopped but restarts after every interactive login through a modified user startup registry path. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- The persistence entry is identified and no longer relaunches after a controlled logon.
- The same account's denied and approved tests appear as distinct normalized outcomes.
- The service authenticates successfully and an unprivileged web request cannot retrieve the private key bundle.
- The analyst distinguishes successful A/AAAA responses from NXDOMAIN errors with timestamped evidence.
Explanation
Correct Answer
A:This outcome is the direct verification of the approved action: Inspect authorized registry run locations and startup artifacts, preserving evidence before removing unauthorized entries. 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 authentication status codes issue and the corrective action Map identity provider event outcomes and failure reasons into consistent SIEM logon categories. It cannot confirm the merchant checkout web service control. Required evidence for the current investigation is: The persistence entry is identified and no longer relaunches after a controlled logon.
C: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 merchant checkout web service control. Required evidence for the current investigation is: The persistence entry is identified and no longer relaunches after a controlled logon.
D:This observation validates another dns response significance issue and the corrective action Read DNS response codes and answer records with the query ID and authoritative context. It cannot confirm the merchant checkout web service control. Required evidence for the current investigation is: The persistence entry is identified and no longer relaunches after a controlled logon.
Question 246
After the vulnerability management analyst at the public-sector records application applies this approved action — Treat the registry and process path as endpoint persistence artifacts and validate the spawned executable. — the original issue is revisited: Endpoint telemetry shows a new registry Run key pointing to an unknown process executable, but analysts treat the key path as a network destination. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- The analysis identifies the HTTPS service on destination port 443 and client ephemeral port separately.
- The summary identifies the high-volume host without collecting the original application payload.
- The incident record links the startup registry value to the correct local process and binary hash.
- The report shows a time-ordered process and network timeline without unobserved steps.
Explanation
Correct Answer
C:This outcome is the direct verification of the approved action: Treat the registry and process path as endpoint persistence artifacts and validate the spawned executable. 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 ephemeral client port issue and the corrective action Use the packet's destination port and session direction to distinguish client ephemeral from server service port. It cannot confirm the public-sector records application control. Required evidence for the current investigation is: The incident record links the startup registry value to the correct local process and binary hash.
B:This observation validates another netflow session summary issue and the corrective action Aggregate approved flow records by endpoint, time, protocol, byte count and direction. It cannot confirm the public-sector records application control. Required evidence for the current investigation is: The incident record links the startup registry value to the correct local process and binary hash.
D:This observation validates another sandbox network indicators issue and the corrective action Reconcile sandbox execution timestamps, DNS lookups and network captures before ordering the observed behaviors. It cannot confirm the public-sector records application control. Required evidence for the current investigation is: The incident record links the startup registry value to the correct local process and binary hash.
Question 247
During preproduction security acceptance, the regional datacenter operations reports this evidence to a endpoint security engineer: A deployment pipeline builds unsigned containers from an unpinned dependency and bypasses its code security gate for releases. The reviewer must distinguish the observable weakness from actor identity and unsupported assumptions. The SOC will compare pre- and postchange event fields under the same source, sensor and collection permissions. Which targeted defensive analysis or remediation action most directly addresses the stated failure while honoring the constraints?
- Add verified dependency pinning, signed artifact provenance and enforced security tests as approval gates in the CI/CD workflow.
- Restrict anonymous read access using scoped identities and validate the private storage policy before resuming report access.
- Attribute the event to the network IDS sensor and validate the signature with supporting packet or flow context.
- Compare process lineage, binary signature and service ownership to an approved server baseline.
Explanation
Correct Answer
A:This action addresses the devsecops pipeline controls issue in the regional datacenter operations, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: An unsigned or vulnerable test build is rejected before release while an approved signed build passes. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
B:That action belongs to a different confidentiality of customer exports issue, such as: A SOC discovers that a report bucket allows anonymous reads even though its data has not been altered and the application stays available. It does not address the specific failure reported by the regional datacenter operations. The decisive acceptance condition for this case is: An unsigned or vulnerable test build is rejected before release while an approved signed build passes.
C:That action belongs to a different ids signature source issue, such as: A log shows a signature ID, sensor interface, packet direction and alert classification, but an analyst labels it a confirmed endpoint antivirus detection. It does not address the specific failure reported by the regional datacenter operations. The decisive acceptance condition for this case is: An unsigned or vulnerable test build is rejected before release while an approved signed build passes.
D:That action belongs to a different running process baseline issue, such as: A production server launches a new unsigned executable after boot, while antivirus reports no known-malware signature. It does not address the specific failure reported by the regional datacenter operations. The decisive acceptance condition for this case is: An unsigned or vulnerable test build is rejected before release while an approved signed build passes.
Question 248
An incident at the regional disaster recovery network is escalated to a SOC automation specialist after incident-response triage reveals: A browser sends a request from TCP source port 51427 to destination 443, and a report labels 51427 as the web server listener. Do not reclassify a detection as malicious solely from a signature identifier. Investigators must record which observation is directly measured and which conclusion remains only an inference. Which targeted defensive analysis or remediation action most directly addresses the stated failure while honoring the constraints?
- Report that encrypted payload reconstruction is unavailable without lawful decryption context; use approved endpoint artifact instead.
- Use the packet's destination port and session direction to distinguish client ephemeral from server service port.
- Deploy an approved endpoint detection agent capable of recording process lineage and command-line executions.
- Inventory exposed addresses, services and identities as attack surfaces separately from assessed vulnerabilities.
Explanation
Correct Answer
B:This action addresses the ephemeral client port issue in the regional disaster recovery network, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The analysis identifies the HTTPS service on destination port 443 and client ephemeral port separately. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A:That action belongs to a different https extraction limit issue, such as: A PCAP contains TLS-encrypted file transfer, but no permitted session keys or endpoint artifact are available and analysts claim plaintext export. It does not address the specific failure reported by the regional disaster recovery network. The decisive acceptance condition for this case is: The analysis identifies the HTTPS service on destination port 443 and client ephemeral port separately.
C:That action belongs to a different host edr placement issue, such as: A workstation executes suspicious PowerShell scripts but perimeter firewall events do not show the local process ancestry. It does not address the specific failure reported by the regional disaster recovery network. The decisive acceptance condition for this case is: The analysis identifies the HTTPS service on destination port 443 and client ephemeral port separately.
D:That action belongs to a different public attack surface inventory issue, such as: A forgotten staging API still listens on the internet even though its active code has no currently identified exploit. It does not address the specific failure reported by the regional disaster recovery network. The decisive acceptance condition for this case is: The analysis identifies the HTTPS service on destination port 443 and client ephemeral port separately.
Question 249
An incident at the global streaming delivery platform is escalated to a incident commander after scheduled SOC detection audit 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. Operations needs evidence that the proposed defense remains effective after a routine service restart. 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?
- Restrict recursive resolver access and correlate query-to-response size asymmetry with suspected reflection activity.
- Deploy the correct identity-matching leaf and intermediate CA chain and validate trust path and hostname.
- Track the verified control of the threat and restoration outcomes as distinct event milestones.
- Score remediation priority using asset value, exposure, likelihood and business impact instead of technical severity alone.
Explanation
Correct Answer
B:This action addresses the tls trust-chain validation issue in the global streaming delivery platform, 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 dns amplification evidence issue, such as: A resolver receives short queries and emits unusually large responses toward spoofed victim addresses while recursion is open publicly. It does not address the specific failure reported by the global streaming delivery platform. 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 mean time to control issue, such as: An incident dashboard uses service recovery time as proof the attack was controlled even though the attacker token remains valid. It does not address the specific failure reported by the global streaming delivery platform. The decisive acceptance condition for this case is: A verified client completes TLS without trust warnings while a fake self-signed endpoint remains untrusted.
D:That action belongs to a different risk prioritization issue, such as: Two vulnerabilities have similar technical severity but only one affects an exposed payment workflow that processes regulated data. It does not address the specific failure reported by the global streaming delivery platform. 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 250
An incident at the healthcare privacy monitoring desk is escalated to a SOC investigation lead after privilege recertification reveals: A printed QR code outside a secure office sends staff to a fake device enrollment page while the domain differs from the company portal. 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. 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?
- Trace scheduled tasks and startup registration, preserve evidence and remove unauthorized persistence under incident controls.
- Inspect SOAR job execution status and endpoint acknowledgment rather than treating initiation as completion.
- Validate enrollment destination through managed device workflows and treat the unsolicited code as an untrusted link.
- Correlate TCP sequence and acknowledgment information to distinguish retransmission from a new application action.
Explanation
Correct Answer
C:This action addresses the qr-code lure issue in the healthcare privacy monitoring desk, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The test device remains unenrolled in the malicious site and a report preserves the code destination. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A:That action belongs to a different malicious persistence issue, such as: A rogue startup task relaunches an unknown executable after reboot even though its visible process was terminated. It does not address the specific failure reported by the healthcare privacy monitoring desk. The decisive acceptance condition for this case is: The test device remains unenrolled in the malicious site and a report preserves the code destination.
B:That action belongs to a different soar playbook execution log issue, such as: An automated isolation request returns success in the portal but the endpoint remains online because the action job actually failed. It does not address the specific failure reported by the healthcare privacy monitoring desk. The decisive acceptance condition for this case is: The test device remains unenrolled in the malicious site and a report preserves the code destination.
D:That action belongs to a different tcp retransmission artifact issue, such as: A data packet appears twice with the same sequence number after a loss event, and the SOC counts it as two separate exfiltration commands. It does not address the specific failure reported by the healthcare privacy monitoring desk. The decisive acceptance condition for this case is: The test device remains unenrolled in the malicious site and a report preserves the code destination.