Cisco Certified Network Associate (CCNA) 200-301 Practice Test 54
Question 530
Repeated attack alerts continue against a router still running the affected release because the approved patch was never installed. The team should investigate which specific technical cause?
- The running firmware is already updated to a fixed version and the alert necessarily proves the patch failed.
- Changing the SNMP community string automatically updates the vulnerable service code.
- The affected device still runs a known vulnerable software release because the approved patch was not installed, so the exploit surface remains.
- Every security alert is proof of a successful compromise rather than attempted exploitation.
Explanation
Correct Answer
C:A ticket approval is not the same as deploying and verifying a fixed version. Check the actual running release and whether the relevant vulnerable service is exposed while prioritizing remediation.
Incorrect Answers
A:The evidence states the affected old release remains installed.
B:Configuration hardening does not install the security patch.
D:An alert may describe blocked attempts; the observed vulnerability and patch status are the main facts.
Question 531
A network security analyst must explain an outage. A team assumes its perimeter firewall eliminates the need to harden internal admin accounts, creating a single point of security failure. Which diagnosis follows from these observations?
- The firewall is only one defensive layer; weak internal administrative accounts remain an exploitable attack path if perimeter filtering is bypassed.
- A perimeter firewall automatically enforces strong password and MFA policy for all internal router local accounts.
- If any firewall rule blocks Internet traffic, insiders can no longer access vulnerable management accounts.
- The only appropriate remedy is to remove all security logs and retain the single firewall.
Explanation
Correct Answer
A:Defense in depth relies on independent protections. Administrative account hardening, strong authentication, least privilege and monitoring remain necessary even with a correctly configured network perimeter.
Incorrect Answers
B:Packet filtering alone cannot guarantee device-account authentication strength.
C:Trusted-side and lateral attack paths remain possible without separate internal controls.
D:Removing detection compounds rather than mitigates the single-control failure.
Question 532
A security team has patched the authentication-bypass flaw documented on an edge appliance. Management wants evidence that the specific software weakness—not merely generic traffic visibility or an alert rule—has been corrected. Which acceptance test is strongest?
- Confirm the intrusion-detection dashboard still displays alerts for unrelated port scans.
- Verify that a firewall policy counts packets on a management subnet, regardless of firmware version.
- Record the installed fixed firmware build and use an authorized vulnerability check that no longer detects the affected authentication-bypass condition.
- Confirm the appliance's web-interface certificate chain is trusted, without checking the bypass mechanism.
Explanation
Correct Answer
C:The most direct evidence combines a software inventory showing the fixed vendor build with a repeatable, authorized check for the previously identified authentication-bypass condition. This distinguishes permanent remediation of the known weakness from temporary mitigation by perimeter controls. Document the target appliance, affected version, new version, check date, and negative detection result; do not assume an absence of unrelated alerts proves safety. This is a verification decision distinct from the earlier item that identifies the misuse of threat, exploit, and vulnerability terms.
Incorrect Answers
A:An intrusion-detection dashboard can reveal attempted scans and general monitoring coverage, but its alert count does not demonstrate that the specific authentication-bypass flaw in the appliance firmware has been fixed. Alerts could continue even after patching or disappear because logging is broken. The requested evidence must reference the affected software release and condition. Keep detection monitoring as a separate compensating control, not the primary verification of remediation for a version-dependent vulnerability.
B:A firewall counter can show whether traffic matched a configured policy, but the authentication-bypass issue may still exist on the device behind that policy. A network filter might reduce reachability to the vulnerable service without removing the underlying defect. Management asked whether the actual software weakness is resolved, so relying on general permit or deny counts is insufficient. Verify the installed fix and perform an authorized check of the bypass condition itself, while retaining network policy and logging as additional safeguards.
D:A trusted TLS certificate is important for authenticating the management web endpoint, but it does not prove that an application-layer authentication-bypass vulnerability is fixed. The bypass may be present regardless of whether TLS handshake and certificate verification succeed. A certificate check is useful for a different configuration issue and could pass on a vulnerable build. The correct test must establish the patched software level and directly exercise or scan the specific flaw using an approved method.
Question 533
The earlier fault was recorded as follows: Repeated attack alerts continue against a router still running the affected release because the approved patch was never installed. After corrective work, which observation provides direct evidence that the affected function now behaves correctly?
- The change ticket is closed but `show version` still reports the known vulnerable release.
- The SOC sees fewer alerts for one hour but the vulnerable service is still publicly reachable on the old release.
- A new DNS record points to the same unpatched device and is treated as remediation.
- The device reports the remediated fixed software version, the relevant vulnerable service is appropriately restricted, and a targeted validation no longer reproduces the original exposure.
Explanation
Correct Answer
D:The prior problem was an approved patch that never landed. Verify installed running version and exposure, rather than assuming ticket closure or fewer scanner alerts proves the code is fixed.
Incorrect Answers
A:Administrative completion without running-code change is not patch verification.
B:Attack volume can vary while the underlying software exposure persists.
C:Name resolution does not replace vulnerable binaries or remove service exposure.
Question 534
A network security analyst has repaired a network problem. A team assumes its perimeter firewall eliminates the need to harden internal admin accounts, creating a single point of security failure. Which device or protocol check is the strongest evidence that this particular failure is gone?
- Only confirm the Internet firewall rule is present while internal router admin accounts remain weak.
- Test independent prevention and detection layers: hardened admin logins/MFA, least-privilege access, firewall segmentation and audit alerts for prohibited attempts.
- Disable internal login failure logs so the firewall is the only visible defense.
- Confirm public web access is blocked without assessing privileged access from compromised inside hosts.
Explanation
Correct Answer
B:The original control gap assumed the perimeter made account hardening unnecessary. A real acceptance check attempts unauthorized paths, checks device-side authentication and verifies monitoring records relevant denials.
Incorrect Answers
A:A perimeter firewall controls traffic through its policy boundary but does not replace secure credentials and access restrictions on internal device management interfaces. Leaving privileged router accounts weak preserves the internal compromise path.
C:Removing auditing eliminates a needed detection layer.
D:The scenario’s missing controls were internal admin-account protection and independent monitoring.
Question 535
A proposed network design has this requirement: Staff should recognize deceptive sign-in messages and report suspicious links instead of entering passwords on imitation pages. Which choice is technically appropriate for that deployment?
- Teach staff to inspect sender/domain and unexpected login URLs, use the verified corporate portal instead of unsolicited links, and report suspected phishing.
- Tell employees to enter their password first so they can determine whether the sign-in page is fake.
- Treat any message bearing a company logo as authentic without examining its URL or origin.
- Encourage staff to forward suspicious links to coworkers for group testing instead of reporting security.
Explanation
Correct Answer
A:Credential-harvesting emails mimic trusted sign-in pages. Awareness training should reinforce safe verification and incident reporting; technical filters and MFA remain complementary protections.
Incorrect Answers
B:Entering credentials on an imitation page can directly compromise them.
C:Logos are easy to imitate and do not establish message authenticity.
D:Uncontrolled forwarding expands exposure; report through the designated security workflow.
Question 536
A network security analyst must implement a change. A secured wiring closet requires controlled badge entry and an auditable visitor escort process. Which technical decision most directly meets these requirements?
- Leave the wiring closet unlocked because network switch passwords are configured.
- Allow any visitor to follow an employee through the secure door without individual logging.
- Treat an emailed meeting invite as a substitute for physical badge authorization at the secure room.
- Use authenticated badge readers for authorized staff and require recorded, escorted visitor entry to the wiring closet.
Explanation
Correct Answer
D:Physical access controls and visitor logs reduce opportunities to tamper with network infrastructure. An escort rule closes the gap where an unbadged visitor could enter on another person’s authorization.
Incorrect Answers
A:Logical credentials do not prevent physical tampering with cabling and hardware.
B:Tailgating bypasses identity and audit trail requirements.
C:A calendar invitation is not a verified physical access credential.
Question 537
A security program must communicate which user and device activities are acceptable, and train staff how to handle sensitive data. The team needs a solution consistent with this requirement. Which option is the most appropriate design or configuration decision?
- Assume all staff understand confidential-data rules merely because the policy exists on a shared drive.
- Allow remote employees to upload sensitive files to personal accounts without guidance to simplify work.
- Train only on office fire exits while omitting remote-device and credential handling requirements.
- Provide role-specific acceptable-use and sensitive-data handling training with documented acknowledgment, remote-device controls and reporting procedures.
Explanation
Correct Answer
D:Remote work policies must explain actual permitted activities, data sharing, devices, storage and what to report when credentials or devices are compromised. A blanket policy file without understanding is weak.
Incorrect Answers
A:Written availability does not establish role-specific comprehension or acknowledgment.
B:That bypasses data handling and authorized storage controls.
C:Physical safety training does not cover the stated remote security and acceptable-use scope.
Question 538
After a realistic phishing simulation, several users entered credentials at a lookalike password-reset site. Incident reports show many victims did not recognize the urgency language or know the reporting process. Which security-program gap should be addressed?
- An employee tailgated through a physical door without a badge.
- Credential-harvesting awareness and phishing-reporting training were inadequate for the observed deceptive sign-in attempt.
- A network port-security violation occurred because a new device MAC was learned.
- The encrypted WLAN requires an upgraded 5 GHz radio channel.
Explanation
Correct Answer
B:The evidence directly shows employees were deceived by a lookalike login page and lacked an established reporting response. Targeted phishing training and reporting drills address this failure mode.
Incorrect Answers
A:Physical entry tailgating is a different social engineering route and does not explain these web-based credential disclosures.
C:MAC port security monitors Layer 2 source addresses and does not educate users about suspicious password-reset links.
D:Radio-channel planning affects wireless interference, not the ability to recognize a credential-phishing website.
Question 539
A network security analyst must explain an outage. A person follows an authorized employee through a door without presenting a badge, bypassing an otherwise functioning reader. Which diagnosis follows from these observations?
- The second person was authenticated because the first badge swipe unlocked the door.
- The unauthorized entrant tailgated behind a badged employee, circumventing the door’s one-person authentication control.
- The primary problem must be a broken network firewall because the physical badge reader functioned.
- The person used a brute-force password attack against the badge reader despite no badge or code attempt being observed.
Explanation
Correct Answer
B:A working badge reader verifies the first person, not necessarily everyone entering before the door closes. Anti-tailgating practices, turnstiles, escort enforcement and monitoring can address this gap.
Incorrect Answers
A:One badge presentation does not authorize an unverified follower.
C:The incident is unauthorized physical entry, not packet filtering.
D:The evidence instead indicates piggybacking on another person’s authorized opening.
Question 540
An audit shows repeated uploads of internal documents to personal cloud accounts. Interviews find that onboarding never explained which storage services were permitted or how to handle company data. Which underlying security-program weakness best explains this pattern?
- The acceptable-use policy and staff onboarding/awareness training did not communicate approved data-handling rules.
- A switch access interface permits a visitor to tailgate through the building entrance reader.
- A phishing simulation had too many employees click deceptive login links, even though no deceptive messages appear here.
- The organization uses 802.1X for wired access rather than relying on a shared WLAN preshared key.
Explanation
Correct Answer
A:Employees cannot consistently follow rules they were never clearly taught. An acceptable-use policy should define authorized services and handling of work documents, and training should reinforce that policy. The reported pattern specifically links violations to missing guidance rather than a broken network control.
Incorrect Answers
B:Tailgating is physical-access bypass at a controlled door. Nothing in the investigation reports visitor entry or badge-reader failures; it cannot explain habitual staff selection of unapproved cloud services.
C:Phishing training helps resist social engineering. Here the uploads were deliberate everyday work behavior attributed to unclear acceptable-use guidance, not deception by an outside sender.
D:802.1X governs port admission and supplicant identity. It can be valuable access security but does not define which external storage services employees may use for proprietary data.
