In public WLAN environments, security and privacy are paramount. To prevent clients from communicating directly with each other, many WLANs implement peer-to-peer blocking (also known as client isolation).
This feature ensures that each client can communicate with the internet but not with other clients on the same network, thereby enhancing security.
The CWDP-305 Official Study and Reference Guide discusses this feature:
"Client isolation prevents wireless clients from communicating directly with each other, which is especially important in public or guest networks to protect user privacy and security." Therefore, the inability to detect other devices on the subnet is likely due to peer-to-peer blocking being enabled on the WLAN infrastructure.
Reference: CWDP-305 Official Study and Reference Guide, Chapter on Post-Design Validation and Troubleshooting

Comprehensive and Detailed Explanation:
Hiding the Service Set Identifier (SSID) can serve specific purposes, such as:
Preventing guests from attempting to join the secured corporate network:By not broadcasting the corporate SSID, casual users are less likely to attempt connections, reducing unauthorized access attempts.
Minimizing help desk calls from users and guests attempting to join the wrong network:When only the guest network SSID is visible, it simplifies the connection process for visitors, leading to fewer support requests.
However, it's important to note that SSID hiding is not a robust security measure. Determined attackers can still detect hidden networks using various tools, as the SSID can be revealed in certain management frames like probe requests and association requests.
Reference:CWDP-305 Study Guide, Chapter on Designing for Specific Applications - SSID Management and Security Considerations.

An AP-on-a-Stick (APoS) survey is a method used to validate predictive WLAN designs by temporarily placing an access point at the planned installation location and measuring its performance in the actual environment. This approach helps in confirming the accuracy of the predictive model and ensures that the AP placement will meet the desired coverage and performance requirements.
Reference: CWDP-305 Official Study and Reference Guide, Chapter on Post-Design ValidationandTroubleshooting

Comprehensive and Detailed Explanation:
In WPA2-Enterprise networks, when a client roams from one BSS to another within the same ESS, it must perform 802.1X authentication again unless fast roaming methods like PMK caching or 802.11r are implemented. This step is not required in WPA2-Personal networks, where the pre-shared key (PSK) allows for a quicker transition without re-authentication.
Reference: CWDP-305 Official Study Guide, Chapter on Wireless Design Process