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At a university, the security and networking lead must establish that a controller is actually connected through its intended switch port bundle rather than merely powered on. During review, someone proposes: "Rely only on the controller power LED." Which technical explanation most directly shows why this proposal does not solve the requirement?
Power does not validate data-plane uplink configuration. The effective remedy is to inspect physical WLC link state and the switch-side aggregation/trunk VLAN status.
DNS metadata does not show physical aggregation status. A true general network fact is not necessarily the direct diagnosis. The named change was rely only on the controller power led, whose relevant defect is that power does not validate data-plane uplink configuration.
The controller may boot even with an uplink member down or a VLAN mismatch; both link and logical mapping must be checked. That distinction is technically relevant elsewhere, but it does not identify the failure of the proposed rely only on the controller power led. The actual issue is that power does not validate data-plane uplink configuration.
Client routing state cannot prove controller-side bundle health. It concerns a different proposed change, not the change being evaluated.
At a university, the campus network lead must administer a router over an untrusted management network without exposing plaintext passwords. Which choice best addresses the stated requirement?
SSH encrypts the management session and authenticates the server endpoint.
Telnet sends management content in plaintext.
Plain HTTP lacks TLS confidentiality.
CDP advertises neighbors and does not authenticate administrators.
At a regional hospital, the campus network lead wants to reach a router for break-glass configuration even when every IP-facing interface is misconfigured. Which choice best addresses the stated requirement?
Console access does not rely on in-band IP reachability.
Failed IP forwarding can prevent SSH transport.
When IP-facing links fail, in-band SSH depends on the failed path; an independent console path supports break-glass administration.
Route entries do not establish a physical out-of-band console.
At a clinic, the infrastructure lead needs centralized AAA-based administrator authentication plus per-command authorization records on supported IOS devices. Which choice best addresses the stated requirement?
TACACS+ can provide centralized administrator AAA and granular command authorization on supported devices.
Shared uncontrolled credentials lack central authorization and accountability.
Neighbor discovery does not authenticate administrative commands.
Central login authentication alone does not supply the requested command-level authorization and accounting controls; TACACS+ is well suited to this requirement.
At a biotech lab, a network operations engineer must administer a router over an untrusted management network without exposing plaintext passwords. During review, someone proposes: "Use Telnet as the preferred encrypted alternative." Which technical explanation most directly shows why this proposal does not solve the requirement?
Telnet sends management content in plaintext. The effective remedy is to use SSH with appropriate user authentication and access restrictions.
CDP advertises neighbors and does not authenticate administrators. It concerns a different proposed change, not the change being evaluated.
Plain HTTP does not encrypt management payloads; Telnet likewise lacks SSH-equivalent confidentiality and server authentication.
SSH encrypts the management session and authenticates the server endpoint. That distinction is technically relevant elsewhere, but it does not identify the failure of the proposed use telnet as the preferred encrypted alternative. The actual issue is that telnet sends management content in plaintext.
At a design agency, the infrastructure lead wants to reach a router for break-glass configuration even when every IP-facing interface is misconfigured. During review, someone proposes: "Depend exclusively on an in-band SSH session through the broken interfaces." Which technical explanation most directly shows why this proposal does not solve the requirement?
Failed IP forwarding can prevent SSH transport. The effective remedy is to use the local console or an appropriate out-of-band management path.
Wi-Fi access alone does not provide console connectivity. It concerns a different proposed change, not the change being evaluated.
Console access does not rely on in-band IP reachability. That distinction is technically relevant elsewhere, but it does not identify the failure of the proposed depend exclusively on an in-band ssh session through the broken interfaces. The actual issue is that failed IP forwarding can prevent SSH transport.
Route entries do not establish a physical out-of-band console. This observation would apply to another device or feature, not the proposed depend exclusively on an in-band ssh session through the broken interfaces. For this scenario, failed IP forwarding can prevent SSH transport is the direct cause.
At a distribution center, the branch support lead needs centralized AAA-based administrator authentication plus per-command authorization records on supported IOS devices. During review, someone proposes: "Replace TACACS+ with CDP advertisements." Which technical explanation most directly shows why this proposal does not solve the requirement?
Neighbor discovery does not authenticate administrative commands. The effective remedy is to use a suitable TACACS+ design with command authorization/accounting policies.
Shared uncontrolled credentials lack central authorization and accountability. That distinction is technically relevant elsewhere, but it does not identify the failure of the proposed replace tacacs+ with cdp advertisements. The actual issue is that neighbor discovery does not authenticate administrative commands.
Descriptions do not govern management privileges. It concerns a different proposed change, not the change being evaluated.
TACACS+ can provide centralized administrator AAA and granular command authorization on supported devices. This observation would apply to another device or feature, not the proposed replace tacacs+ with cdp advertisements. For this scenario, neighbor discovery does not authenticate administrative commands is the direct cause.
At a research campus, the migration lead has created a WLAN in the controller GUI but clients report no association to the intended SSID. Which choice best addresses the stated requirement?
An SSID entry existing in a GUI does not guarantee active AP policy or client availability.
A routing-metric change does not make a disabled WLAN visible to clients or restore its AP/controller association policy.
A saved configuration can remain disabled or unmapped.
Removing the desired network prevents association altogether.
At a regional hospital, the security and networking lead needs guest clients on a WPA2-Personal WLAN and uses a GUI profile with a required pre-shared key. Which choice best addresses the stated requirement?
Personal-mode WPA2-PSK requires matching keys and supported encryption settings.
A label cannot enable cryptographic authentication.
QoS marking does not establish WLAN authentication.
SSID visibility does not change the WPA2-Personal authentication and encryption configuration clients must use.
At a municipal utility, the infrastructure lead needs application voice traffic to receive the specified wireless QoS treatment after an SSID profile update. Which choice best addresses the stated requirement?
WLAN QoS settings influence how radio client traffic is prioritized; correct SSID security alone is not a QoS proof.
Authentication keys do not directly control WMM traffic priorities.
Without the WLAN, the voice clients cannot use it.
Wireless QoS requires appropriate classification and WMM category mapping; a generic WMM enablement alone may not prioritize unclassified voice.
At an e-commerce platform, the site engineer must diagnose a working SSID with clients authenticated but receiving addresses from an unintended VLAN. Which choice best addresses the stated requirement?
Authentication success does not guarantee that client frames are placed in the expected VLAN.
Removing addressing service does not repair the VLAN mapping error.
PSK affects authentication, not by itself client VLAN mapping.
Signal power does not choose a broadcast domain.
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