Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) 200-201 Practice Test 29
Question 280
During scheduled SOC detection audit, the branch DNS resolver network reports this evidence to a forensic evidence custodian: The SOC installs only endpoint malware scanners and misses lateral movement between unmonitored network appliances. The reviewer must distinguish the observable weakness from actor identity and unsupported assumptions. A separate healthy network segment must remain online and unchanged throughout the controlled experiment. Which targeted defensive analysis or remediation action most directly addresses the stated failure while honoring the constraints?
- Deploy an approved network sensor at the relevant routed segment and correlate its alerts with existing endpoint telemetry.
- Apply the approved owner-managed discretionary access control model for the nonclassified collaboration folder.
- Verify event context, affected scope and credibility before selecting proportionate containment.
- Mark the defensive interruption at the observed stage and avoid assuming later unauthorized actions occurred.
Explanation
Correct Answer
A:This action addresses the network ids coverage issue in the branch DNS resolver network, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: A safe lateral-traffic test generates a network event while endpoint security controls remain enabled. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
B: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 branch DNS resolver network. The decisive acceptance condition for this case is: A safe lateral-traffic test generates a network event while endpoint security controls remain enabled.
C:That action belongs to a different initial triage of suspicious login issue, such as: A single denied login occurs but a responder immediately wipes the user laptop without investigating related identity or endpoint evidence. It does not address the specific failure reported by the branch DNS resolver network. The decisive acceptance condition for this case is: A safe lateral-traffic test generates a network event while endpoint security controls remain enabled.
D:That action belongs to a different kill chain defensive interruption issue, such as: A safe simulated phishing attempt is blocked at mail delivery, but an analyst reports successful attacker objectives solely from initial reconnaissance. It does not address the specific failure reported by the branch DNS resolver network. The decisive acceptance condition for this case is: A safe lateral-traffic test generates a network event while endpoint security controls remain enabled.
Question 281
After the network detection engineer at the regional datacenter operations applies this approved action — Apply output encoding for the exact HTML context and a defense-in-depth content security policy. — the original issue is revisited: A support ticket title is reflected into HTML without escaping, and a test browser executes a harmless injected script. 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.
- The test text renders as inert characters and no script runs in the analyst browser.
- The incident is correlated once and only the approved playbook revokes a test token with a recorded decision.
- The investigation can reproduce the disputed event from a validated source rather than relying only on a screenshot.
Explanation
Correct Answer
B:This outcome is the direct verification of the approved action: Apply output encoding for the exact HTML context and a defense-in-depth content security policy. 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 regional datacenter operations control. Required evidence for the current investigation is: The test text renders as inert characters and no script runs in the analyst browser.
C:This observation validates another siem versus soar responsibilities issue and the corrective action Correlate and normalize events in the SIEM, then invoke an approved auditable SOAR playbook for the authorized containment step. It cannot confirm the regional datacenter operations control. Required evidence for the current investigation is: The test text renders as inert characters and no script runs in the analyst browser.
D: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 regional datacenter operations control. Required evidence for the current investigation is: The test text renders as inert characters and no script runs in the analyst browser.
Question 282
After the cloud audit engineer at the public-sector records application applies this approved action — Review user and system cron jobs and relevant journals, then remove the unauthorized task under incident controls. — the original issue is revisited: A temporary executable reappears every five minutes via a newly installed cron entry despite removal of the original process. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- The process stays absent over the expected scheduling interval and logs document the original trigger.
- The safe simulated sequence triggers detection despite absence of a known bad file hash.
- The injected safe alert appears in monitoring but production forwarding remains unaffected by the tap.
- Inline policy drops the test flow while passive sensor only records it and cannot disrupt the connection.
Explanation
Correct Answer
A:This outcome is the direct verification of the approved action: Review user and system cron jobs and relevant journals, then remove the unauthorized task under incident controls. 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 indicators of attack issue and the corrective action Track behavioral IoA sequences with process lineage and account context, not only static file signatures. It cannot confirm the public-sector records application control. Required evidence for the current investigation is: The process stays absent over the expected scheduling interval and logs document the original trigger.
C:This observation validates another passive tap behavior issue and the corrective action Treat the tap as out-of-band observation and place enforcement only at a designed inline control point. It cannot confirm the public-sector records application control. Required evidence for the current investigation is: The process stays absent over the expected scheduling interval and logs document the original trigger.
D:This observation validates another application ips placement issue and the corrective action Distinguish enforcement-capable inline IPS placement from passive out-of-band IDS monitoring. It cannot confirm the public-sector records application control. Required evidence for the current investigation is: The process stays absent over the expected scheduling interval and logs document the original trigger.
Question 283
A vulnerability management analyst at the regulated banking VPN gateway investigates during network tap coverage review: A scanner repeatedly flags a known missing patch but the SOC closes each alert without assigning an owner or confirming remediation. Follow authorized incident-response roles and maintain evidence integrity throughout. The measurement must distinguish the specifically affected network or process from a separate unaffected control group. Which targeted defensive analysis or remediation action most directly addresses the stated failure while honoring the constraints?
- Assign named stakeholders and measurable follow-up evidence to lessons-learned improvements.
- Assign a vulnerability owner, track approved risk decisions and require rescanning after corrective changes.
- Identify the firewall enforcement device and trace the effective rule and relevant connection attempt.
- Choose a permissioned full-packet capture if application payload reconstruction is required.
Explanation
Correct Answer
B:This action addresses the vulnerability lifecycle tracking issue in the regulated banking VPN gateway, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The vulnerability record has accountable ownership and a verified closure scan or explicit accepted exception. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A:That action belongs to a different lessons learned accountability issue, such as: A postincident improvement list includes many actions but no owner, due date or control effectiveness metric. It does not address the specific failure reported by the regulated banking VPN gateway. The decisive acceptance condition for this case is: The vulnerability record has accountable ownership and a verified closure scan or explicit accepted exception.
C:That action belongs to a different firewall allow-deny decision issue, such as: A record includes rule identifier, source and destination zones, verdict deny and session action, yet operations classifies it as an HTTP application error. It does not address the specific failure reported by the regulated banking VPN gateway. The decisive acceptance condition for this case is: The vulnerability record has accountable ownership and a verified closure scan or explicit accepted exception.
D:That action belongs to a different packet versus flow fields issue, such as: Analysts attempt to extract an HTTP response body from NetFlow summaries that contain only addresses, ports, byte counts and timings. It does not address the specific failure reported by the regulated banking VPN gateway. The decisive acceptance condition for this case is: The vulnerability record has accountable ownership and a verified closure scan or explicit accepted exception.
Question 284
During forensic evidence quality assessment, the energy-sector security monitoring center reports this evidence to a SOC investigation lead: A server's SSH brute-force activity is overlooked because the team reads only the web access log. Retain endpoint process, user and timestamp context while limiting access to sensitive records. A separate healthy network segment must remain online and unchanged throughout the controlled experiment. The comparison host belongs to a separate managed endpoint policy group with different users and process ancestry; preserve the suspect host execution trail and avoid interpreting the second machine as proof of activity on the first. Which targeted defensive analysis or remediation action most directly addresses the stated failure while honoring the constraints?
- Examine the Linux authentication journal or auth log for SSHD failures and source addresses.
- Treat a nontriggered detonation as limited observation and correlate static clues and environment requirements.
- Separate identity verification from privilege evaluation and retain tamper-resistant user action audit events.
- Calculate containment time to the verified stop of unauthorized activity rather than administrative assignment.
Explanation
Correct Answer
A:This action addresses the linux authentication logs issue in the energy-sector security monitoring center, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The repeated rejected logins are attributed to the right remote source and service. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
B:That action belongs to a different sandbox false-negative interpretation issue, such as: A sample performs no malicious action in a sandbox but requires a specific application environment that the lab did not reproduce. It does not address the specific failure reported by the energy-sector security monitoring center. The decisive acceptance condition for this case is: The repeated rejected logins are attributed to the right remote source and service.
C:That action belongs to a different authentication authorization accounting issue, such as: An internal gateway accepts an authenticated login and assumes it need not check authorization or retain a user action audit. It does not address the specific failure reported by the energy-sector security monitoring center. The decisive acceptance condition for this case is: The repeated rejected logins are attributed to the right remote source and service.
D:That action belongs to a different mean time to contain issue, such as: A team records an incident as contained when a ticket is assigned, even though the compromised endpoint keeps reaching external C2 for another hour. It does not address the specific failure reported by the energy-sector security monitoring center. The decisive acceptance condition for this case is: The repeated rejected logins are attributed to the right remote source and service.
Question 285
A security monitoring architect at the multi-tenant hosting provider investigates during weekly threat-hunting exercise: A workstation sends repeated small encrypted POST requests to an unapproved domain and the team dismisses them because individual packets are tiny. Differentiate the security objective from the tool used to enforce it, and retain authorized user access. 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?
- Enrich the indicators with confidence and observation context and prioritize matches to the organization's actual protected assets.
- Aggregate transfers by client and destination over time and correlate process ancestry with authorized data-export policy.
- Follow the initial SYN direction and header fields to assign client and server endpoints correctly.
- Map adversary, infrastructure, capability and victim vertices separately using available evidence.
Explanation
Correct Answer
B:This action addresses the encoded upload behavior issue in the multi-tenant hosting provider, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The combined profile exposes the unusual cumulative transfer and links it to the originating process. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A: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 multi-tenant hosting provider. The decisive acceptance condition for this case is: The combined profile exposes the unusual cumulative transfer and links it to the originating process.
C:That action belongs to a different source and destination direction issue, such as: In a PCAP a client opens a TCP connection from an ephemeral port to a server on 443, but an alert reverses source and destination. It does not address the specific failure reported by the multi-tenant hosting provider. The decisive acceptance condition for this case is: The combined profile exposes the unusual cumulative transfer and links it to the originating process.
D:That action belongs to a different diamond model victim infrastructure issue, such as: A case lists an external IP, targeted employee and malware hash but labels every element as the attacker. It does not address the specific failure reported by the multi-tenant hosting provider. The decisive acceptance condition for this case is: The combined profile exposes the unusual cumulative transfer and links it to the originating process.
Question 286
A security monitoring architect at the regional disaster recovery network investigates during business continuity tabletop: A report calls an unpatched public service the attacker and labels an actual hostile operator a software defect. Differentiate the security objective from the tool used to enforce it, and retain authorized user access. 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?
- Verify the release signature or approved hash and replace the modified artifact from a trusted build provenance record.
- Correlate logon type, account purpose, source device and approved access policy in server profiling.
- Record the exposed software weakness as the vulnerability and the capable adversary or hazard as the threat.
- Apply the approved stateful session policy so response packets are associated with an established authorized connection.
Explanation
Correct Answer
C:This action addresses the threat versus vulnerability issue in the regional disaster recovery network, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The risk register differentiates the vulnerable asset from the external actor and associates a plausible exploitation path. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A: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 regional disaster recovery network. The decisive acceptance condition for this case is: The risk register differentiates the vulnerable asset from the external actor and associates a plausible exploitation path.
B: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 regional disaster recovery network. The decisive acceptance condition for this case is: The risk register differentiates the vulnerable asset from the external actor and associates a plausible exploitation path.
D:That action belongs to a different stateful firewall session tracking issue, such as: A permitted outbound connection returns on a randomized ephemeral port, but a proposed stateless rule blocks all unlisted return packets. It does not address the specific failure reported by the regional disaster recovery network. The decisive acceptance condition for this case is: The risk register differentiates the vulnerable asset from the external actor and associates a plausible exploitation path.
Question 287
During scheduled SOC detection audit, the financial services API reports this evidence to a host incident responder: A service relies on one VPN password as its entire protection and has no device or application-level policy. The reviewer must distinguish the observable weakness from actor identity and unsupported assumptions. 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 a scoped rolling-time-window baseline with appropriate rate and deviation thresholds for the API identity.
- Correlate DNS response history, timestamps, TTL and network flows rather than using a current lookup retroactively.
- Enforce distinct identity verification, network segmentation and application authorization as separate protective layers.
- Include asset owners, IT operations, legal and security responders in preparation responsibilities and escalation mapping.
Explanation
Correct Answer
C:This action addresses the layered credential controls issue in the financial services API, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: A stolen VPN password alone does not grant the test user access to a restricted application action. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A:That action belongs to a different sliding-window anomalies issue, such as: A security alert triggers on raw daily request volume but misses a sudden five-minute burst against one API credential. It does not address the specific failure reported by the financial services API. The decisive acceptance condition for this case is: A stolen VPN password alone does not grant the test user access to a restricted application action.
B:That action belongs to a different hostname and ip pivoting issue, such as: A DNS query resolves to a rapidly changing address and the SOC attributes all historical traffic to the currently returned IP. It does not address the specific failure reported by the financial services API. The decisive acceptance condition for this case is: A stolen VPN password alone does not grant the test user access to a restricted application action.
D:That action belongs to a different preparation stakeholder ownership issue, such as: A SOC builds detections without engaging IT service owners who know which systems are critical or where telemetry is stored. It does not address the specific failure reported by the financial services API. The decisive acceptance condition for this case is: A stolen VPN password alone does not grant the test user access to a restricted application action.
Question 288
After the SOC investigation lead at the container runtime security platform applies this approved action — Evaluate actual asset criticality, confirmed impact and exposure instead of using signature severity as the incident priority alone. — the original issue is revisited: A medium-severity IDS alert targets an isolated lab VM, while a lower-confidence alert concerns active production credential misuse. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- The triage queue reflects observed business impact and documents confidence in each verdict.
- The conflicting ARP claim is mapped to an unauthorized switch port while legitimate gateway resolution continues.
- The investigation can reproduce the disputed event from a validated source rather than relying only on a screenshot.
- Return traffic for the approved session passes while unsolicited inbound connections remain denied.
Explanation
Correct Answer
A:This outcome is the direct verification of the approved action: Evaluate actual asset criticality, confirmed impact and exposure instead of using signature severity as the incident priority alone. 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 arp reply conflict issue and the corrective action Validate ARP sender-protocol and sender-hardware address bindings against trusted gateway inventory. It cannot confirm the container runtime security platform control. Required evidence for the current investigation is: The triage queue reflects observed business impact and documents confidence in each verdict.
C: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 container runtime security platform control. Required evidence for the current investigation is: The triage queue reflects observed business impact and documents confidence in each verdict.
D: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 container runtime security platform control. Required evidence for the current investigation is: The triage queue reflects observed business impact and documents confidence in each verdict.
Question 289
The multinational manufacturing network detects an exception during network tap coverage review; its tier-1 security analyst confirms: An inline IPS blocks a simulated malicious payload, but the incident team assumes a passive mirrored sensor would have blocked the same flow. Separate collector limitations from a real application or network failure before deciding. The acceptance test includes a permitted operation and an explicitly disallowed operation, with both verdicts recorded. The alternate packet sample contains a second legitimate conversation plus harmless transport retransmissions; isolate the investigated exchange using its precise tuple and direction, and do not treat an unrelated control connection as attack evidence. 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.
- Distinguish enforcement-capable inline IPS placement from passive out-of-band IDS monitoring.
- Restrict simulation egress to approved controlled sinks and preserve attempted destination metadata.
- Use a collision-resistant digest appropriate to the integrity requirement and document the algorithm and handling procedures.
Explanation
Correct Answer
B:This action addresses the application ips placement issue in the multinational manufacturing network, 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
A:That action belongs to a different passive tap behavior issue, such as: A passive fiber tap produces complete packet copies, and a change proposal expects it to stop live traffic with an alert setting. It does not address the specific failure reported by the multinational manufacturing network. 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 sandbox network containment issue, such as: An unknown executable in a sandbox attempts to reach a real production authentication endpoint, while analysts allow unrestricted outbound test traffic. It does not address the specific failure reported by the multinational manufacturing network. 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 endpoint hash collision assumption issue, such as: An analyst treats an MD5 match as absolute proof of file authenticity for a high-assurance chain-of-custody requirement. It does not address the specific failure reported by the multinational manufacturing network. 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 290
After the threat intelligence analyst at the healthcare privacy monitoring desk applies this approved action — Use authorized write-blocked acquisition and preserve the source medium in secure custody. — the original issue is revisited: A forensic examiner mounts the only evidence drive read-write, causing automated filesystem updates before the initial image is secured. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- The source medium shows no investigator-induced writes and the acquired image has a validated digest.
- Each action has a responsible owner, deadline and verifiable acceptance result.
- The simulation produces an endpoint behavior alert linked to the process tree and changed key.
- The analyst sees required dashboards but a simulated firewall-policy modification is refused.
Explanation
Correct Answer
A:This outcome is the direct verification of the approved action: Use authorized write-blocked acquisition and preserve the source medium in secure custody. 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 lessons learned accountability issue and the corrective action Assign named stakeholders and measurable follow-up evidence to lessons-learned improvements. It cannot confirm the healthcare privacy monitoring desk control. Required evidence for the current investigation is: The source medium shows no investigator-induced writes and the acquired image has a validated digest.
C:This observation validates another behavioral edr alert issue and the corrective action Correlate endpoint behavior rules for unusual parent-child execution and persistence changes independent of file hash reputation. It cannot confirm the healthcare privacy monitoring desk control. Required evidence for the current investigation is: The source medium shows no investigator-induced writes and the acquired image has a validated digest.
D:This observation validates another role-based soc privileges issue and the corrective action Assign a read-only SOC analyst role and keep incident-response configuration changes under separately approved administrative roles. It cannot confirm the healthcare privacy monitoring desk control. Required evidence for the current investigation is: The source medium shows no investigator-induced writes and the acquired image has a validated digest.