If an access point (AP) fails to power up via Power over Ethernet (PoE), but the Ethernet cable functions correctly with other devices, the most probable cause is that the PoE switch has exhausted its power budget.
Each PoE switch has a maximum power capacity, and exceeding this limit can prevent additional devices from receiving power.Extreme Networks The CWDP-305 Official Study and Reference Guide discusses the importance of monitoring PoE budgets during WLAN deployments.
Reference: CWDP-305 Official Study and Reference Guide, Chapter on Post-Design ValidationandTroubleshooting

Band steering is a technique used to encourage dual-band clients to connect to the less congested 5 GHz band.
However, some client devices are persistent and may not respond to steering attempts, continuing to probe only on the 2.4 GHz band. To ensure these clients can still connect to the network, band steering algorithms are designed to eventually allow association on the 2.4 GHz band after a certain number of ignored Probe Requests. This approach balances optimal network performance with client compatibility.
Extreme Networks Documentation
Reference: CWDP-305 Official Study and Reference Guide, Chapter on ProtocolandSpectrum Analysis

In high-security or regulated environments like food processing plants, it's crucial to obtain proper authorization before entering restricted zones. The CWDP-305 Study Guide emphasizes that site surveyors must follow all site-specific safety and access policies. Entering restricted areas without prior clearance can result in serious compliance violations. Therefore, the surveyor must coordinate with the customer's facilities or security team to gain appropriate access prior to beginning the survey.
Reference: CWDP-305 Study Guide, Chapter on Advanced Site Surveys - "Survey planning for secure or regulated environments"
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Comprehensive and Detailed Explanation:
In a Single Channel Architecture (SCA), all APs operate on the same channel and present a single virtual BSSID to clients. The WLAN controller manages client associations by directing the most appropriate AP to handle communication with the client, typically based on the strongest Received Signal Strength Indicator (RSSI).
This architecture simplifies client roaming and reduces co-channel interference, as the controller orchestrates AP transmissions to prevent collisions.
Reference:CWDP-305 Study Guide, Chapter on Infrastructure Design - Single Channel Architecture.

Comprehensive and Detailed Explanation:
In wired networks, VLANs effectively segment traffic into separate broadcast domains, isolating traffic between different VLANs. However, in wireless networks, while VLANs are used to assign different SSIDs to different VLANs, the wireless medium is inherently shared. This means that, despite VLAN assignments, all wireless traffic is transmitted over the same RF medium, and clients can still hear all transmissions.
Therefore, wireless VLANs do not always provide the same level of traffic segmentation as wired VLANs.
Reference:CWDP-305 Study Guide, Chapter on Infrastructure Design - VLAN Implementation in WLANs.