Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) 200-201 Practice Test 10
Question 90
After the security monitoring architect at the telecom customer identity platform applies this approved action — Interpret IPv6 next-header chaining and extension fields before identifying the transport protocol. — the original issue is revisited: A capture shows IPv6 packets with a next-header value for TCP after permitted extension headers, but the parser labels them all as UDP. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- The revised flow record identifies the initial source and destination consistent with the handshake.
- The same account's denied and approved tests appear as distinct normalized outcomes.
- A controlled ARP check resolves to the authorized gateway and the conflicting port is identified.
- The decoded header chain reveals the actual supported transport without false UDP classification.
Explanation
Correct Answer
D:This outcome is the direct verification of the approved action: Interpret IPv6 next-header chaining and extension fields before identifying the transport protocol. 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 source and destination direction issue and the corrective action Follow the initial SYN direction and header fields to assign client and server endpoints correctly. It cannot confirm the telecom customer identity platform control. Required evidence for the current investigation is: The decoded header chain reveals the actual supported transport without false UDP classification.
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 telecom customer identity platform control. Required evidence for the current investigation is: The decoded header chain reveals the actual supported transport without false UDP classification.
C:This observation validates another arp spoofing indicators issue and the corrective action Compare expected gateway MAC bindings and switch port evidence before isolating the unauthorized ARP advertiser. It cannot confirm the telecom customer identity platform control. Required evidence for the current investigation is: The decoded header chain reveals the actual supported transport without false UDP classification.
Question 91
After the endpoint security engineer at the international logistics dispatch applies this approved action — Record each evidence transfer, custodian, time, storage condition and integrity hash in the evidence log. — the original issue is revisited: A forensic image is passed among analysts with no record of who accessed it, where it was held or whether it changed. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- The incident timeline retains separate host identities and maps each API call to its actual source.
- Each action has a responsible owner, deadline and verifiable acceptance result.
- Every custody handoff is reconstructable and the image digest stays consistent.
- Review shows the callback trust boundary, relevant threat scenario and passing negative replay test.
Explanation
Correct Answer
C:This outcome is the direct verification of the approved action: Record each evidence transfer, custodian, time, storage condition and integrity hash in the evidence log. 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 system event provenance issue and the corrective action Correlate stable host identity and event source metadata before joining cross-system event records. It cannot confirm the international logistics dispatch control. Required evidence for the current investigation is: Every custody handoff is reconstructable and the image digest stays consistent.
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 international logistics dispatch control. Required evidence for the current investigation is: Every custody handoff is reconstructable and the image digest stays consistent.
D:This observation validates another threat modeling boundaries issue and the corrective action Update the data-flow threat model and document a control for the identity callback's authentication and replay boundaries. It cannot confirm the international logistics dispatch control. Required evidence for the current investigation is: Every custody handoff is reconstructable and the image digest stays consistent.
Question 92
A tier-1 security analyst at the medical claims application investigates during business continuity tabletop: A malware family is associated with a well-known campaign, and the analyst labels every sample from that family as the same actor. Preserve volatile artifacts and provenance without interrupting unrelated hosts. The change team will retest the specific baseline failure without broad production scanning or unsafe payloads. Which targeted defensive analysis or remediation action most directly addresses the stated failure while honoring the constraints?
- Reconcile sandbox execution timestamps, DNS lookups and network captures before ordering the observed behaviors.
- Use approved agent-based runtime telemetry for process-level evidence and retain agentless assessment for scheduled configuration coverage.
- Keep observed tool and infrastructure indicators distinct from actor attribution and require independent corroboration.
- Classify the archive as protected intellectual property and use authorized restricted evidence storage.
Explanation
Correct Answer
C:This action addresses the threat actor confidence issue in the medical claims application, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The case clearly records observed malware behavior and an appropriately qualified actor hypothesis. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A: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 medical claims application. The decisive acceptance condition for this case is: The case clearly records observed malware behavior and an appropriately qualified actor hypothesis.
B:That action belongs to a different agentless versus agent-based visibility issue, such as: The security team scans offline VM snapshots and claims it has continuous visibility into runtime memory and new child processes. It does not address the specific failure reported by the medical claims application. The decisive acceptance condition for this case is: The case clearly records observed malware behavior and an appropriately qualified actor hypothesis.
D:That action belongs to a different intellectual property leakage issue, such as: A source repository archive is attached to an unrestricted incident ticket for convenience although it contains unpublished proprietary algorithms. It does not address the specific failure reported by the medical claims application. The decisive acceptance condition for this case is: The case clearly records observed malware behavior and an appropriately qualified actor hypothesis.
Question 93
The regulated banking VPN gateway detects an exception during monitoring baseline revision; its vulnerability management analyst confirms: Tier-1 analysts receive a suspected data leak but escalate only to facilities, omitting privacy and data owners. Record both positive and negative control results with an accountable incident owner. 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?
- Reconcile stable asset identity, service owner, network address history and configuration records before containment.
- Route the classified detection to the correct SOC escalation, data owner and privacy or legal stakeholders as policy requires.
- Limit the host firewall rule to the jump-host source and expected management port with auditing enabled.
- Map external frontend, ephemeral client and internal backend ports in the application request chain.
Explanation
Correct Answer
B:This action addresses the detection stakeholder handoff issue in the regulated banking VPN gateway, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The case shows a timely, authorized escalation with no disclosure to unrelated departments. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A: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 regulated banking VPN gateway. The decisive acceptance condition for this case is: The case shows a timely, authorized escalation with no disclosure to unrelated departments.
C:That action belongs to a different host firewall inbound application issue, such as: A Windows management service is accessible from a guest VLAN even though remote support must originate from a designated jump host. It does not address the specific failure reported by the regulated banking VPN gateway. The decisive acceptance condition for this case is: The case shows a timely, authorized escalation with no disclosure to unrelated departments.
D:That action belongs to a different client/server port roles issue, such as: A reverse proxy accepts on TCP 8443 and forwards to TCP 8080, and the analyst claims both ports indicate identical client roles. It does not address the specific failure reported by the regulated banking VPN gateway. The decisive acceptance condition for this case is: The case shows a timely, authorized escalation with no disclosure to unrelated departments.
Question 94
After the SOC automation specialist at the medical claims application applies this approved action — Aggregate approved flow records by endpoint, time, protocol, byte count and direction. — the original issue is revisited: An analyst must establish which host transferred the largest volume to an unusual external address, but examining full packets violates capture scope. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- A verified client completes TLS without trust warnings while a fake self-signed endpoint remains untrusted.
- The summary identifies the high-volume host without collecting the original application payload.
- A harmless approved test marker receives the expected alert with current definition timestamps.
- The packet interpretation shows local gateway MAC at layer two and remote service IP at layer three.
Explanation
Correct Answer
B:This outcome is the direct verification of the approved action: Aggregate approved flow records by endpoint, time, protocol, byte count and direction. It proves the corrective or detection objective through observed evidence, not simply because a rule was saved or an alarm was acknowledged.
Incorrect Answers
A:This observation validates another tls trust-chain validation issue and the corrective action Deploy the correct identity-matching leaf and intermediate CA chain and validate trust path and hostname. It cannot confirm the medical claims application control. Required evidence for the current investigation is: The summary identifies the high-volume host without collecting the original application payload.
C:This observation validates another antivirus signature limitations issue and the corrective action Restore trusted signature update connectivity and verify the endpoint malware engine and protection status. It cannot confirm the medical claims application control. Required evidence for the current investigation is: The summary identifies the high-volume host without collecting the original application payload.
D:This observation validates another ethernet mac roles issue and the corrective action Identify link-layer next-hop MAC addresses separately from end-to-end IP source and destination. It cannot confirm the medical claims application control. Required evidence for the current investigation is: The summary identifies the high-volume host without collecting the original application payload.
Question 95
During preproduction security acceptance, the retail fraud response desk reports this evidence to a endpoint security engineer: A SOC builds detections without engaging IT service owners who know which systems are critical or where telemetry is stored. Protect regulated information and retain a tested service recovery path. The incident ticket must identify the logging layer that produced the observation and its known blind spots. Which targeted defensive analysis or remediation action most directly addresses the stated failure while honoring the constraints?
- Map adversary, infrastructure, capability and victim vertices separately using available evidence.
- Review secure email gateway attachment verdicts, sender authentication, and quarantine reason metadata.
- Record the exposed software weakness as the vulnerability and the capable adversary or hazard as the threat.
- Include asset owners, IT operations, legal and security responders in preparation responsibilities and escalation mapping.
Explanation
Correct Answer
D:This action addresses the preparation stakeholder ownership issue in the retail fraud response desk, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The response matrix names accountable owners and contact paths for each critical service. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A: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 retail fraud response desk. The decisive acceptance condition for this case is: The response matrix names accountable owners and contact paths for each critical service.
B:That action belongs to a different email filtering attachments issue, such as: Users receive malicious macro-enabled documents while a report checks only firewall port statistics for mail delivery. It does not address the specific failure reported by the retail fraud response desk. The decisive acceptance condition for this case is: The response matrix names accountable owners and contact paths for each critical service.
C:That action belongs to a different threat versus vulnerability issue, such as: A report calls an unpatched public service the attacker and labels an actual hostile operator a software defect. It does not address the specific failure reported by the retail fraud response desk. The decisive acceptance condition for this case is: The response matrix names accountable owners and contact paths for each critical service.
Question 96
After the vulnerability management analyst at the financial services API applies this approved action — Identify link-layer next-hop MAC addresses separately from end-to-end IP source and destination. — the original issue is revisited: A packet capture crosses a router and the analyst assumes its frame destination MAC equals the remote internet application's MAC. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- The injected safe alert appears in monitoring but production forwarding remains unaffected by the tap.
- Each action has a responsible owner, deadline and verifiable acceptance result.
- The packet interpretation shows local gateway MAC at layer two and remote service IP at layer three.
- Postchange comparison matches the approved rules and an unauthorized deviation produces an alert.
Explanation
Correct Answer
C:This outcome is the direct verification of the approved action: Identify link-layer next-hop MAC addresses separately from end-to-end IP source and destination. 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 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 financial services API control. Required evidence for the current investigation is: The packet interpretation shows local gateway MAC at layer two and remote service IP at layer three.
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 financial services API control. Required evidence for the current investigation is: The packet interpretation shows local gateway MAC at layer two and remote service IP at layer three.
D:This observation validates another configuration baseline drift issue and the corrective action Detect and document configuration drift and apply the authorized baseline correction with tested rollback. It cannot confirm the financial services API control. Required evidence for the current investigation is: The packet interpretation shows local gateway MAC at layer two and remote service IP at layer three.
Question 97
After the SOC investigation lead at the telecom customer identity platform applies this approved action — Restore trusted signature update connectivity and verify the endpoint malware engine and protection status. — the original issue is revisited: A known test malware marker is missed because an endpoint's antivirus definitions stopped updating after it left VPN coverage. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- A forensic scan locates the indicator on the affected host without flagging every HTTPS connection.
- A harmless approved test marker receives the expected alert with current definition timestamps.
- The log interpretation identifies recipient policy rejection rather than transport establishment failure.
- Authorized login succeeds after the failing node is isolated, without changing accounts or releasing confidential logs.
Explanation
Correct Answer
B:This outcome is the direct verification of the approved action: Restore trusted signature update connectivity and verify the endpoint malware engine and protection status. 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 indicators of compromise issue and the corrective action Record verified host-based IoCs with source, time, confidence and relevant detection use. It cannot confirm the telecom customer identity platform control. Required evidence for the current investigation is: A harmless approved test marker receives the expected alert with current definition timestamps.
C:This observation validates another smtp sequence reading issue and the corrective action Interpret SMTP response codes at the application layer separately from socket and TLS connection status. It cannot confirm the telecom customer identity platform control. Required evidence for the current investigation is: A harmless approved test marker receives the expected alert with current definition timestamps.
D:This observation validates another availability of authentication issue and the corrective action Remove unhealthy endpoints using real application health probes and restore a redundant authentication service path. It cannot confirm the telecom customer identity platform control. Required evidence for the current investigation is: A harmless approved test marker receives the expected alert with current definition timestamps.
Question 98
The hospital network incident team detects an exception during change-controlled validation; its network protocol analyst confirms: A SOC groups two flows together using destination port alone although source and destination addresses and protocols differ. Keep least privilege and approval boundaries intact while testing the security decision. 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?
- Correlate source IP, source port, destination IP, destination port and transport protocol to isolate the exact flow.
- Enforce mandatory access controls using central sensitivity labels and clearance rules that owners cannot override.
- Map external frontend, ephemeral client and internal backend ports in the application request chain.
- Use permitted web-category and URL filtering event data to identify blocked malicious destinations.
Explanation
Correct Answer
A:This action addresses the five-tuple identity issue in the hospital network incident team, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The matched alert and packet record share all five tuple fields while unrelated traffic is excluded. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
B:That action belongs to a different mandatory classification issue, such as: A highly classified document remains accessible because its owner added an external user despite a compulsory information label. It does not address the specific failure reported by the hospital network incident team. The decisive acceptance condition for this case is: The matched alert and packet record share all five tuple fields while unrelated traffic is excluded.
C:That action belongs to a different client/server port roles issue, such as: A reverse proxy accepts on TCP 8443 and forwards to TCP 8080, and the analyst claims both ports indicate identical client roles. It does not address the specific failure reported by the hospital network incident team. The decisive acceptance condition for this case is: The matched alert and packet record share all five tuple fields while unrelated traffic is excluded.
D:That action belongs to a different web content filter context issue, such as: A browser reaches known phishing pages over HTTPS yet analysts monitor only endpoint infection alerts after the fact. It does not address the specific failure reported by the hospital network incident team. The decisive acceptance condition for this case is: The matched alert and packet record share all five tuple fields while unrelated traffic is excluded.
Question 99
After the network detection engineer at the container runtime security platform applies this approved action — Read the IP protocol and transport headers before labeling a conversation as UDP or TCP. — the original issue is revisited: A capture shows UDP destination 53, but an incident report incorrectly asserts that a TCP session was established. Which measured result is the strongest evidence that this specific control or investigation objective has been met?
- The report identifies authenticated metadata while explicitly marking unseen encrypted application content.
- The unauthorized task and process do not reappear after a controlled restart.
- A signed-in read-only identity cannot perform the administrative action and its attempt is recorded.
- The report correctly identifies the datagram conversation without inventing a three-way handshake.
Explanation
Correct Answer
D:This outcome is the direct verification of the approved action: Read the IP protocol and transport headers before labeling a conversation as UDP or TCP. 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 encrypted deep inspection caveat issue and the corrective action Delimit packet-header visibility and obtain consented endpoint or legally authorized decryption evidence where applicable. It cannot confirm the container runtime security platform control. Required evidence for the current investigation is: The report correctly identifies the datagram conversation without inventing a three-way handshake.
B:This observation validates another malicious persistence issue and the corrective action Trace scheduled tasks and startup registration, preserve evidence and remove unauthorized persistence under incident controls. It cannot confirm the container runtime security platform control. Required evidence for the current investigation is: The report correctly identifies the datagram conversation without inventing a three-way handshake.
C:This observation validates another authentication authorization accounting issue and the corrective action Separate identity verification from privilege evaluation and retain tamper-resistant user action audit events. It cannot confirm the container runtime security platform control. Required evidence for the current investigation is: The report correctly identifies the datagram conversation without inventing a three-way handshake.
Question 100
The online enrollment service detects an exception during change-controlled validation; its network detection engineer confirms: A lost managed phone retains corporate mail tokens after a contractor's account is disabled, and the MDM record still shows active enrollment. Record both positive and negative control results with an accountable incident owner. A documented service owner has requested that the solution preserve active approved sessions throughout verification. Which targeted defensive analysis or remediation action most directly addresses the stated failure while honoring the constraints?
- Correlate logon type, account purpose, source device and approved access policy in server profiling.
- Revoke device tokens and perform authorized selective wipe or device retirement under the mobile management policy.
- Escape the literal period in the hostname regex and verify word or field boundaries.
- Aggregate permitted peer-to-peer connection metadata and correlate it with authorized application inventory.
Explanation
Correct Answer
B:This action addresses the mobile device offboarding issue in the online enrollment service, matching the observed mechanism rather than a different threat or tool. The acceptance test must demonstrate: The lost device no longer reaches protected email and authorized devices remain enrolled. The relevant least-privilege and evidence-custody boundaries remain enforced.
Incorrect Answers
A: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 online enrollment service. The decisive acceptance condition for this case is: The lost device no longer reaches protected email and authorized devices remain enrolled.
C:That action belongs to a different regex escaped dot issue, such as: A URL filter pattern uses an unescaped dot between hostname labels and accidentally matches unrelated characters. It does not address the specific failure reported by the online enrollment service. The decisive acceptance condition for this case is: The lost device no longer reaches protected email and authorized devices remain enrolled.
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 online enrollment service. The decisive acceptance condition for this case is: The lost device no longer reaches protected email and authorized devices remain enrolled.