Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) 200-201 Practice Test 27
Question 260
An incident at the identity federation production tenant is escalated to a SOC automation specialist after forensic evidence quality assessment reveals: A server usually sends tens of megabytes per minute, then begins transmitting gigabytes to an unknown address during a low-traffic period. Do not expand containment or investigative access to unrelated tenants or systems. 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?
- Track the verified control of the threat and restoration outcomes as distinct event milestones.
- Build time-aware baselines and alert on sustained deviation conditioned on established workload schedules.
- Compare source-specific throughput and destination volume to the approved interval baseline.
- Apply the approved stateful session policy so response packets are associated with an established authorized connection.
Explanation
Correct Answer
C:This action addresses the network throughput baseline issue in the identity federation production tenant, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: A bounded report identifies the abnormal byte-rate and its exact destination without relying on one sampled packet. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A: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 identity federation production tenant. The decisive acceptance condition for this case is: A bounded report identifies the abnormal byte-rate and its exact destination without relying on one sampled packet.
B:That action belongs to a different statistical baseline deviation issue, such as: A SOC treats every traffic spike as malicious and ignores normal weekly backup peaks in historical measurements. It does not address the specific failure reported by the identity federation production tenant. The decisive acceptance condition for this case is: A bounded report identifies the abnormal byte-rate and its exact destination without relying on one sampled packet.
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 identity federation production tenant. The decisive acceptance condition for this case is: A bounded report identifies the abnormal byte-rate and its exact destination without relying on one sampled packet.
Question 261
A network detection engineer at the remote distribution branch investigates during business continuity tabletop: One network path is tapped for detection but return traffic follows a separate gateway, leaving sessions incomplete in the capture. Differentiate the security objective from the tool used to enforce it, and retain authorized user access. 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?
- Combine maintained signatures with behavioral monitoring and document which threat classes each method covers.
- Define practical exercise cadence, acceptance checks and plan improvement based on measured test results.
- Map both directional paths and adjust approved monitoring locations or correlate complementary sensors.
- Anchor the expression to the beginning of the relevant field and test against normal and failing events.
Explanation
Correct Answer
C:This action addresses the asymmetric sensor placement issue in the remote distribution branch, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: Bidirectional test sessions can be reconstructed or the missing direction is explicitly identified. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A:That action belongs to a different signature detection tradeoff issue, such as: A detector flags a known malicious payload string accurately but does not alert on a novel execution technique with different bytes. It does not address the specific failure reported by the remote distribution branch. The decisive acceptance condition for this case is: Bidirectional test sessions can be reconstructed or the missing direction is explicitly identified.
B:That action belongs to a different playbook test criteria issue, such as: A response plan is considered complete after approval but no one has rehearsed evidence capture or system restoration. It does not address the specific failure reported by the remote distribution branch. The decisive acceptance condition for this case is: Bidirectional test sessions can be reconstructed or the missing direction is explicitly identified.
D:That action belongs to a different regex anchors issue, such as: A log rule meant to match lines starting with FAIL matches benign text with the word elsewhere in a longer line. It does not address the specific failure reported by the remote distribution branch. The decisive acceptance condition for this case is: Bidirectional test sessions can be reconstructed or the missing direction is explicitly identified.
Question 262
After the host incident responder at the university campus defense center applies this approved action — Preserve the most direct authenticated original event record and its source metadata for the specific claim. — the original issue is revisited: An administrator claims that a screen capture of a log viewer proves a raw event never existed, despite a complete authenticated log export. 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 investigation can reproduce the disputed event from a validated source rather than relying only on a screenshot.
- The test host is disconnected from unauthorized paths while neighboring control systems stay available.
- The incident record distinguishes confirmed network facts from low-confidence attribution without naming an unsupported actor.
Explanation
Correct Answer
B:This outcome is the direct verification of the approved action: Preserve the most direct authenticated original event record and its source metadata for the specific claim. 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 host incident responder at the university campus defense center applies this approved action — Preserve the most direct authenticated original event record and its source metadata for the specific claim. — the original issue is revisited: An administrator….
Incorrect Answers
A:This observation validates another linux scheduled task persistence issue and the corrective action Review user and system cron jobs and relevant journals, then remove the unauthorized task under incident controls. It cannot confirm the university campus defense center control. Required evidence for the current investigation is: The investigation can reproduce the disputed event from a validated source rather than relying only on a screenshot.
C:This observation validates another containment with continuity issue and the corrective action Isolate the affected endpoint through a tested scoped method, preserving critical approved services and forensic evidence. It cannot confirm the university campus defense center control. Required evidence for the current investigation is: The investigation can reproduce the disputed event from a validated source rather than relying only on a screenshot.
D:This observation validates another threat actor attribution caution issue and the corrective action Separate observable infrastructure indicators from actor-attribution confidence and require corroborating tactics and independent evidence. It cannot confirm the university campus defense center control. Required evidence for the current investigation is: The investigation can reproduce the disputed event from a validated source rather than relying only on a screenshot.
Question 263
After the endpoint security engineer at the multinational manufacturing network applies this approved action — Classify a detected real-positive test condition as a true positive and record the supporting ground truth. — the original issue is revisited: A detector alerts on a validated harmless attack simulation that is explicitly flagged as malicious test traffic. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- The classification pairs a fired alert with confirmed positive test evidence.
- The incident summary classifies a rejected application login rather than successful authentication.
- A safe lateral-traffic test generates a network event while endpoint security controls remain enabled.
- A controlled process launch produces timely execution telemetry that static snapshot scans alone do not contain.
Explanation
Correct Answer
A:This outcome is the direct verification of the approved action: Classify a detected real-positive test condition as a true positive and record the supporting ground truth. 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 http method and status issue and the corrective action Interpret HTTP method, path and 401 status independently of network reachability. It cannot confirm the multinational manufacturing network control. Required evidence for the current investigation is: The classification pairs a fired alert with confirmed positive test evidence.
C:This observation validates another network ids coverage issue and the corrective action Deploy an approved network sensor at the relevant routed segment and correlate its alerts with existing endpoint telemetry. It cannot confirm the multinational manufacturing network control. Required evidence for the current investigation is: The classification pairs a fired alert with confirmed positive test evidence.
D:This observation validates another agentless versus agent-based visibility issue and the corrective action Use approved agent-based runtime telemetry for process-level evidence and retain agentless assessment for scheduled configuration coverage. It cannot confirm the multinational manufacturing network control. Required evidence for the current investigation is: The classification pairs a fired alert with confirmed positive test evidence.
Question 264
The enterprise incident response bridge detects an exception during postincident evidence review; its threat intelligence analyst confirms: A compromised workstation is discovered in a production control network, and the team proposes shutting down the entire facility without confirming dependencies. Record both positive and negative control results with an accountable incident owner. The acceptance test includes a permitted operation and an explicitly disallowed operation, with both verdicts recorded. Which targeted defensive analysis or remediation action most directly addresses the stated failure while honoring the constraints?
- Prioritize by exploit evidence, criticality, internet exposure and tested deployment/rollback dependencies.
- Evaluate exploit preconditions independent of program length and justify the attack-complexity setting.
- Choose a permissioned full-packet capture if application payload reconstruction is required.
- Isolate the affected endpoint through a tested scoped method, preserving critical approved services and forensic evidence.
Explanation
Correct Answer
D:This action addresses the containment with continuity issue in the enterprise incident response bridge, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The test host is disconnected from unauthorized paths while neighboring control systems stay available. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A:That action belongs to a different patch management priorities issue, such as: A critical internet-facing service has an available security patch, but a maintenance spreadsheet lists updates by oldest ticket date only. It does not address the specific failure reported by the enterprise incident response bridge. The decisive acceptance condition for this case is: The test host is disconnected from unauthorized paths while neighboring control systems stay available.
B:That action belongs to a different cvss attack complexity issue, such as: A vulnerability requires a rare race condition but the scorer marks it as low complexity because the exploit code is short. It does not address the specific failure reported by the enterprise incident response bridge. The decisive acceptance condition for this case is: The test host is disconnected from unauthorized paths while neighboring control systems stay available.
C: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 enterprise incident response bridge. The decisive acceptance condition for this case is: The test host is disconnected from unauthorized paths while neighboring control systems stay available.
Question 265
During scheduled SOC detection audit, the identity federation production tenant reports this evidence to a incident commander: A simple ACL permits TCP 443 but cannot distinguish SQL injection in application content from ordinary HTTPS requests. The validation may use only authorized test traffic and must preserve source-direction evidence. 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?
- Evaluate actual asset criticality, confirmed impact and exposure instead of using signature severity as the incident priority alone.
- Use an eligible application-layer inspection control for permitted decrypted HTTP content while retaining network ACL enforcement.
- Treat the event correlation and evidence assessment as detection-and-analysis activities.
- Aggregate permitted peer-to-peer connection metadata and correlate it with authorized application inventory.
Explanation
Correct Answer
B:This action addresses the packet-filter limitations issue in the identity federation production tenant, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The safe injection probe triggers application inspection and normal HTTPS requests remain allowed. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A:That action belongs to a different impact versus severity issue, such as: A medium-severity IDS alert targets an isolated lab VM, while a lower-confidence alert concerns active production credential misuse. It does not address the specific failure reported by the identity federation production tenant. The decisive acceptance condition for this case is: The safe injection probe triggers application inspection and normal HTTPS requests remain allowed.
C:That action belongs to a different detection and analysis classification issue, such as: A SIEM correlates suspicious DNS and identity events but the team labels that analytic step as postincident lessons learned. It does not address the specific failure reported by the identity federation production tenant. The decisive acceptance condition for this case is: The safe injection probe triggers application inspection and normal HTTPS requests remain allowed.
D:That action belongs to a different peer-to-peer transfer patterns issue, such as: An endpoint makes hundreds of short connections to changing external peers, but a single-destination firewall rule misses the aggregate pattern. It does not address the specific failure reported by the identity federation production tenant. The decisive acceptance condition for this case is: The safe injection probe triggers application inspection and normal HTTPS requests remain allowed.
Question 266
After the SOC investigation lead at the regional payments SOC applies this approved action — Correlate SYN/SYN-ACK completion, source dispersion and edge resource metrics to classify a suspected SYN flood. — the original issue is revisited: An edge service records a huge increase in half-open TCP handshakes and high SYN rates while application requests decline. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- A controlled benign encryption simulator triggers containment while unaffected hosts stay online.
- The simulated short burst triggers while normal daily traffic does not create the same alert.
- The telemetry shows abnormal incomplete handshakes and the mitigation preserves ordinary connections.
- A confirmed matching indicator is escalated while uncorroborated stale addresses remain triaged for review.
Explanation
Correct Answer
C:This outcome is the direct verification of the approved action: Correlate SYN/SYN-ACK completion, source dispersion and edge resource metrics to classify a suspected SYN flood. 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 ransomware behavioral signal issue and the corrective action Isolate the affected host under the response playbook and correlate file changes with process and network events. It cannot confirm the regional payments SOC control. Required evidence for the current investigation is: The telemetry shows abnormal incomplete handshakes and the mitigation preserves ordinary connections.
B:This observation validates another sliding-window anomalies issue and the corrective action Use a scoped rolling-time-window baseline with appropriate rate and deviation thresholds for the API identity. It cannot confirm the regional payments SOC control. Required evidence for the current investigation is: The telemetry shows abnormal incomplete handshakes and the mitigation preserves ordinary connections.
D:This observation validates another threat intelligence relevance issue and the corrective action Enrich the indicators with confidence and observation context and prioritize matches to the organization's actual protected assets. It cannot confirm the regional payments SOC control. Required evidence for the current investigation is: The telemetry shows abnormal incomplete handshakes and the mitigation preserves ordinary connections.
Question 267
After the vulnerability management analyst at the warehouse IoT segment applies this approved action — Correlate timestamped DHCP leases, endpoint asset identity and switch or wireless association logs. — the original issue is revisited: A suspicious outbound flow uses a reused DHCP address and responders isolate the wrong laptop without checking lease history. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- The repeated rejected logins are attributed to the right remote source and service.
- The next simulated alert has usable logs and a documented owner before any real incident occurs.
- The investigation names the correct device and excludes another device that received the IP later.
- A test request maps to its true originating client while untrusted spoofed forwarding headers are rejected.
Explanation
Correct Answer
C:This outcome is the direct verification of the approved action: Correlate timestamped DHCP leases, endpoint asset identity and switch or wireless association logs. 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 authentication logs issue and the corrective action Examine the Linux authentication journal or auth log for SSHD failures and source addresses. It cannot confirm the warehouse IoT segment control. Required evidence for the current investigation is: The investigation names the correct device and excludes another device that received the IP later.
B:This observation validates another preparation asset coverage issue and the corrective action During preparation, register the asset, establish telemetry and rehearse an authorized response route. It cannot confirm the warehouse IoT segment control. Required evidence for the current investigation is: The investigation names the correct device and excludes another device that received the IP later.
D:This observation validates another load balancer source rewriting issue and the corrective action Correlate load balancer request IDs and trusted forwarded-client fields with backend and edge logs. It cannot confirm the warehouse IoT segment control. Required evidence for the current investigation is: The investigation names the correct device and excludes another device that received the IP later.
Question 268
A vulnerability management analyst at the merchant checkout web service investigates during weekly threat-hunting exercise: A suspicious executable is stopped but restarts after every interactive login through a modified user startup registry path. Preserve volatile artifacts and provenance without interrupting unrelated hosts. 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?
- Correlate independent process and authentication evidence to strengthen the incident reconstruction.
- Score remediation priority using asset value, exposure, likelihood and business impact instead of technical severity alone.
- Use upstream rate-limiting and DDoS analysis appropriate to distributed sources rather than a single-source-only block.
- Inspect authorized registry run locations and startup artifacts, preserving evidence before removing unauthorized entries.
Explanation
Correct Answer
D:This action addresses the windows registry persistence issue in the merchant checkout web service, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The persistence entry is identified and no longer relaunches after a controlled logon. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A:That action belongs to a different corroborative endpoint evidence issue, such as: A host EDR record reports process execution while a centralized identity event shows the same account sign-in at that timestamp. It does not address the specific failure reported by the merchant checkout web service. The decisive acceptance condition for this case is: The persistence entry is identified and no longer relaunches after a controlled logon.
B: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 merchant checkout web service. The decisive acceptance condition for this case is: The persistence entry is identified and no longer relaunches after a controlled logon.
C:That action belongs to a different distributed request flood issue, such as: A single egress firewall rule is proposed for an HTTP flood arriving from thousands of unrelated source networks. It does not address the specific failure reported by the merchant checkout web service. The decisive acceptance condition for this case is: The persistence entry is identified and no longer relaunches after a controlled logon.
Question 269
A network protocol analyst at the enterprise incident response bridge investigates during weekly threat-hunting exercise: An analyst scores a web-facing unauthenticated vulnerability as requiring physical contact despite exploitation over a routable interface. Differentiate the security objective from the tool used to enforce it, and retain authorized user access. 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?
- Restrict anonymous read access using scoped identities and validate the private storage policy before resuming report access.
- Reconcile stable asset identity, service owner, network address history and configuration records before containment.
- Select the attack-vector metric that matches reachable remote network exploitation, with evidence from the exposed endpoint.
- Treat Tor exit nodes as egress infrastructure and seek authenticated identity and host evidence for attribution.
Explanation
Correct Answer
C:This action addresses the cvss attack vector issue in the enterprise incident response bridge, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The scoring record identifies network reachability without falsely requiring local or physical presence. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A: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 enterprise incident response bridge. The decisive acceptance condition for this case is: The scoring record identifies network reachability without falsely requiring local or physical presence.
B:That action belongs to a different asset inventory accountability issue, such as: A suspected compromised server cannot be assigned an owner because its address was reused and the CMDB lacks its serial and deployment context. It does not address the specific failure reported by the enterprise incident response bridge. The decisive acceptance condition for this case is: The scoring record identifies network reachability without falsely requiring local or physical presence.
D:That action belongs to a different tor anonymity limits issue, such as: A remote login originates from a Tor exit node, and the SOC claims that IP uniquely identifies the operator's home device. It does not address the specific failure reported by the enterprise incident response bridge. The decisive acceptance condition for this case is: The scoring record identifies network reachability without falsely requiring local or physical presence.
Question 270
After the host incident responder at the third-party partner exchange applies this approved action — Delimit packet-header visibility and obtain consented endpoint or legally authorized decryption evidence where applicable. — the original issue is revisited: A network DPI appliance sees only ciphertext for a TLS channel and its report claims to have read an unauthorized login password. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- The diagram shows each listener and client role consistent with observed proxy logs.
- The change record contains both business-function acceptance and security clearance.
- The connection metadata shows the expected supported ephemeral key exchange and certificate authentication.
- The report identifies authenticated metadata while explicitly marking unseen encrypted application content.
Explanation
Correct Answer
D:This outcome is the direct verification of the approved action: Delimit packet-header visibility and obtain consented endpoint or legally authorized decryption evidence where applicable. 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 client/server port roles issue and the corrective action Map external frontend, ephemeral client and internal backend ports in the application request chain. It cannot confirm the third-party partner exchange control. Required evidence for the current investigation is: The report identifies authenticated metadata while explicitly marking unseen encrypted application content.
B:This observation validates another recovery approval responsibility issue and the corrective action Require the designated service owner and security authority to approve restoration after objective validation. It cannot confirm the third-party partner exchange control. Required evidence for the current investigation is: The report identifies authenticated metadata while explicitly marking unseen encrypted application content.
C:This observation validates another key-exchange evidence issue and the corrective action Inspect the negotiated key-exchange mechanism and protocol transcript rather than inferring the mode from the certificate. It cannot confirm the third-party partner exchange control. Required evidence for the current investigation is: The report identifies authenticated metadata while explicitly marking unseen encrypted application content.