Question 530 A new branch router responds to ping but rejects SSH even though transport input permits SSH; its VTY lines require login local and no local account exists. Which technical mechanism best explains the behavior observed in this scenario? SCP rides over SSH but its server-side file-transfer capability can require distinct feature activation and privilege. VTY `login local` authenticates against the device's local account database; network reachability alone is insufficient. TFTP uses UDP exchanges and data ports that do not behave like a single persistent TCP session. Traditional FTP exposes control credentials and file contents unless specifically protected by a secure variant. ExplanationCorrect Answer B:VTY `login local` authenticates against the device's local account database; network reachability alone is insufficient. This explains why the initial condition produces the observed failure. The direct repair is: Configure an appropriate local user with secret and privilege or bind the approved AAA method list. Validate through: Confirm a controlled SSH login and check VTY authentication settings without weakening access control. Other Answers A:SCP rides over SSH but its server-side file-transfer capability can require distinct feature activation and privilege. VTY `login local` authenticates against the device's local account database; network reachability alone is insufficient. C:TFTP uses UDP exchanges and data ports that do not behave like a single persistent TCP session. VTY `login local` authenticates against the device's local account database; network reachability alone is insufficient. D:Traditional FTP exposes control credentials and file contents unless specifically protected by a secure variant. VTY `login local` authenticates against the device's local account database; network reachability alone is insufficient.
Question 531 A new branch router responds to ping but rejects SSH even though transport input permits SSH; its VTY lines require login local and no local account exists. After applying the correction, which verification evidence most directly demonstrates that this issue is resolved? Transfer a harmless test file by SCP and confirm integrity while maintaining access restrictions. Verify a complete backup over the encrypted transport and review captured packets for exposed credentials. Confirm a controlled SSH login and check VTY authentication settings without weakening access control. Capture a complete file transfer with appropriate transport counters or transition to a verified SCP backup. ExplanationCorrect Answer C:Confirm a controlled SSH login and check VTY authentication settings without weakening access control. This checks the affected traffic or control-plane behavior, not merely a generic up/down indicator. The underlying mechanism is: VTY `login local` authenticates against the device's local account database; network reachability alone is insufficient. Other Answers A:Transfer a harmless test file by SCP and confirm integrity while maintaining access restrictions. VTY `login local` authenticates against the device's local account database; network reachability alone is insufficient. B:Verify a complete backup over the encrypted transport and review captured packets for exposed credentials. VTY `login local` authenticates against the device's local account database; network reachability alone is insufficient. D:Capture a complete file transfer with appropriate transport counters or transition to a verified SCP backup. VTY `login local` authenticates against the device's local account database; network reachability alone is insufficient.
Question 532 A new branch router responds to ping but rejects SSH even though transport input permits SSH; its VTY lines require login local and no local account exists. Which lasting design or operational safeguard best prevents this particular issue from recurring? Include secure management protocol activation and certificate lifecycle in router hardening templates. Keep out-of-band console access and remote-access rollback tests for all AAA changes. Classify management-file transfers and default to encrypted protocols in automation templates. Provision and test privileged break-glass credentials before enabling remote-management authentication. ExplanationCorrect Answer D:Provision and test privileged break-glass credentials before enabling remote-management authentication. This addresses the recurring cause: VTY `login local` authenticates against the device's local account database; network reachability alone is insufficient. A targeted acceptance check is: Confirm a controlled SSH login and check VTY authentication settings without weakening access control. Other Answers A:Include secure management protocol activation and certificate lifecycle in router hardening templates. VTY `login local` authenticates against the device's local account database; network reachability alone is insufficient. B:Keep out-of-band console access and remote-access rollback tests for all AAA changes. VTY `login local` authenticates against the device's local account database; network reachability alone is insufficient. C:Classify management-file transfers and default to encrypted protocols in automation templates. VTY `login local` authenticates against the device's local account database; network reachability alone is insufficient.
Question 533 An administrator can Telnet to a legacy router, but the policy requires encrypted remote CLI access. Which corrective action most directly resolves the documented failure without suppressing unrelated safeguards? Enable supported SSHv2 and restrict VTY transport to SSH after confirming key and authentication readiness. Enable and validate the device's HTTPS secure server service while disabling the unnecessary HTTP service. Verify SCP server capability and enable the supported SCP service with the required authentication/authorization. Migrate backup automation to an approved encrypted transfer such as SCP with restricted credentials. ExplanationCorrect Answer A:Enable supported SSHv2 and restrict VTY transport to SSH after confirming key and authentication readiness. Telnet carries management credentials and session traffic without SSH's encryption and integrity protection. Capture the change from permitted Telnet to refused Telnet and successful authenticated SSH. Other Answers B:Enable and validate the device's HTTPS secure server service while disabling the unnecessary HTTP service. Telnet carries management credentials and session traffic without SSH's encryption and integrity protection. C:Verify SCP server capability and enable the supported SCP service with the required authentication/authorization. Telnet carries management credentials and session traffic without SSH's encryption and integrity protection. D:Migrate backup automation to an approved encrypted transfer such as SCP with restricted credentials. Telnet carries management credentials and session traffic without SSH's encryption and integrity protection.
Question 534 An administrator can Telnet to a legacy router, but the policy requires encrypted remote CLI access. Which technical mechanism best explains the behavior observed in this scenario? TFTP uses UDP exchanges and data ports that do not behave like a single persistent TCP session. Telnet carries management credentials and session traffic without SSH's encryption and integrity protection. VTY access-class policy governs which source networks may establish remote management sessions. SCP rides over SSH but its server-side file-transfer capability can require distinct feature activation and privilege. ExplanationCorrect Answer B:Telnet carries management credentials and session traffic without SSH's encryption and integrity protection. This explains why the initial condition produces the observed failure. The direct repair is: Enable supported SSHv2 and restrict VTY transport to SSH after confirming key and authentication readiness. Validate through: Capture the change from permitted Telnet to refused Telnet and successful authenticated SSH. Other Answers A:TFTP uses UDP exchanges and data ports that do not behave like a single persistent TCP session. Telnet carries management credentials and session traffic without SSH's encryption and integrity protection. C:VTY access-class policy governs which source networks may establish remote management sessions. Telnet carries management credentials and session traffic without SSH's encryption and integrity protection. D:SCP rides over SSH but its server-side file-transfer capability can require distinct feature activation and privilege. Telnet carries management credentials and session traffic without SSH's encryption and integrity protection.
Question 535 An administrator can Telnet to a legacy router, but the policy requires encrypted remote CLI access. After applying the correction, which verification evidence most directly demonstrates that this issue is resolved? Capture a complete file transfer with appropriate transport counters or transition to a verified SCP backup. Test remote access after correction while preserving working console recovery. Capture the change from permitted Telnet to refused Telnet and successful authenticated SSH. Verify a complete backup over the encrypted transport and review captured packets for exposed credentials. ExplanationCorrect Answer C:Capture the change from permitted Telnet to refused Telnet and successful authenticated SSH. This checks the affected traffic or control-plane behavior, not merely a generic up/down indicator. The underlying mechanism is: Telnet carries management credentials and session traffic without SSH's encryption and integrity protection. Other Answers A:Capture a complete file transfer with appropriate transport counters or transition to a verified SCP backup. Telnet carries management credentials and session traffic without SSH's encryption and integrity protection. B:Test remote access after correction while preserving working console recovery. Telnet carries management credentials and session traffic without SSH's encryption and integrity protection. D:Verify a complete backup over the encrypted transport and review captured packets for exposed credentials. Telnet carries management credentials and session traffic without SSH's encryption and integrity protection.
Question 536 An administrator can Telnet to a legacy router, but the policy requires encrypted remote CLI access. Which lasting design or operational safeguard best prevents this particular issue from recurring? Standardize secured backup transport and include actual transfer tests rather than ping-only checks. Maintain a controlled management-source allowlist and test it on new devices. Add SCP service checks to configuration-backup automation acceptance. Ban insecure VTY transports and audit remote-access protocol settings regularly. ExplanationCorrect Answer D:Ban insecure VTY transports and audit remote-access protocol settings regularly. This addresses the recurring cause: Telnet carries management credentials and session traffic without SSH's encryption and integrity protection. A targeted acceptance check is: Capture the change from permitted Telnet to refused Telnet and successful authenticated SSH. Other Answers A:Standardize secured backup transport and include actual transfer tests rather than ping-only checks. Telnet carries management credentials and session traffic without SSH's encryption and integrity protection. B:Maintain a controlled management-source allowlist and test it on new devices. Telnet carries management credentials and session traffic without SSH's encryption and integrity protection. C:Add SCP service checks to configuration-backup automation acceptance. Telnet carries management credentials and session traffic without SSH's encryption and integrity protection.
Question 537 SSH from a management jump host succeeds, but attempts from user VLANs also reach the router despite a policy forbidding them. Which corrective action most directly resolves the documented failure without suppressing unrelated safeguards? Apply a narrowly scoped management access class or control policy to VTY connections. Enable supported SSHv2 and restrict VTY transport to SSH after confirming key and authentication readiness. Use console access to inspect VTY line configuration, AAA method lists and applied ACL before a disruptive reload. Verify SCP server capability and enable the supported SCP service with the required authentication/authorization. ExplanationCorrect Answer A:Apply a narrowly scoped management access class or control policy to VTY connections. VTY access-class policy governs which source networks may establish remote management sessions. Confirm permitted jump-host access and denied test connections from a user subnet. Other Answers B:Enable supported SSHv2 and restrict VTY transport to SSH after confirming key and authentication readiness. VTY access-class policy governs which source networks may establish remote management sessions. C:Use console access to inspect VTY line configuration, AAA method lists and applied ACL before a disruptive reload. VTY access-class policy governs which source networks may establish remote management sessions. D:Verify SCP server capability and enable the supported SCP service with the required authentication/authorization. VTY access-class policy governs which source networks may establish remote management sessions.
Question 538 SSH from a management jump host succeeds, but attempts from user VLANs also reach the router despite a policy forbidding them. Which technical mechanism best explains the behavior observed in this scenario? Traditional FTP exposes control credentials and file contents unless specifically protected by a secure variant. VTY access-class policy governs which source networks may establish remote management sessions. VTY `login local` authenticates against the device's local account database; network reachability alone is insufficient. Console and VTY line settings are separate management entry points, so local console success does not prove remote line configuration. ExplanationCorrect Answer B:VTY access-class policy governs which source networks may establish remote management sessions. This explains why the initial condition produces the observed failure. The direct repair is: Apply a narrowly scoped management access class or control policy to VTY connections. Validate through: Confirm permitted jump-host access and denied test connections from a user subnet. Other Answers A:Traditional FTP exposes control credentials and file contents unless specifically protected by a secure variant. VTY access-class policy governs which source networks may establish remote management sessions. C:VTY `login local` authenticates against the device's local account database; network reachability alone is insufficient. VTY access-class policy governs which source networks may establish remote management sessions. D:Console and VTY line settings are separate management entry points, so local console success does not prove remote line configuration. VTY access-class policy governs which source networks may establish remote management sessions.
Question 539 SSH from a management jump host succeeds, but attempts from user VLANs also reach the router despite a policy forbidding them. After applying the correction, which verification evidence most directly demonstrates that this issue is resolved? Verify successful HTTPS with expected certificate and refusal of insecure HTTP on the management interface. Capture a complete file transfer with appropriate transport counters or transition to a verified SCP backup. Confirm permitted jump-host access and denied test connections from a user subnet. Test remote access after correction while preserving working console recovery. ExplanationCorrect Answer C:Confirm permitted jump-host access and denied test connections from a user subnet. This checks the affected traffic or control-plane behavior, not merely a generic up/down indicator. The underlying mechanism is: VTY access-class policy governs which source networks may establish remote management sessions. Other Answers A:Verify successful HTTPS with expected certificate and refusal of insecure HTTP on the management interface. VTY access-class policy governs which source networks may establish remote management sessions. B:Capture a complete file transfer with appropriate transport counters or transition to a verified SCP backup. VTY access-class policy governs which source networks may establish remote management sessions. D:Test remote access after correction while preserving working console recovery. VTY access-class policy governs which source networks may establish remote management sessions.
Question 540 SSH from a management jump host succeeds, but attempts from user VLANs also reach the router despite a policy forbidding them. Which lasting design or operational safeguard best prevents this particular issue from recurring? Classify management-file transfers and default to encrypted protocols in automation templates. Standardize secured backup transport and include actual transfer tests rather than ping-only checks. Include secure management protocol activation and certificate lifecycle in router hardening templates. Maintain a controlled management-source allowlist and test it on new devices. ExplanationCorrect Answer D:Maintain a controlled management-source allowlist and test it on new devices. This addresses the recurring cause: VTY access-class policy governs which source networks may establish remote management sessions. A targeted acceptance check is: Confirm permitted jump-host access and denied test connections from a user subnet. Other Answers A:Classify management-file transfers and default to encrypted protocols in automation templates. VTY access-class policy governs which source networks may establish remote management sessions. B:Standardize secured backup transport and include actual transfer tests rather than ping-only checks. VTY access-class policy governs which source networks may establish remote management sessions. C:Include secure management protocol activation and certificate lifecycle in router hardening templates. VTY access-class policy governs which source networks may establish remote management sessions.
