In environments like museums, aesthetic considerations are paramount. To maintain the visual integrity of exhibits while ensuring robust wireless coverage, APs can be concealed using plastic covers that match the surroundings. These covers are designed to be RF-transparent, ensuring that signal strength and quality are not compromised.

Other options are less suitable:

Locking the AP inside a metal box would severely attenuate the wireless signal due to the shielding effect of metal.

Placing APs between walls and I-beams may obstruct signal propagation and complicate maintenance.

Using outdated technology like 802.11b APs would not meet modern performance standards and could introduce compatibility issues.

When the WLAN controller and APs reside on different subnets, a router is required to facilitate communication between them. The router enables Layer 3 routing, allowing the APs to discover and communicate with the controller across subnet boundaries.

Comprehensive and Detailed Explanation:

In scenarios where the 2.4 GHz radio is not used for standard access point operations, it can be repurposed for functions such as security monitoring. Utilizing the 2.4 GHz radio for monitoring allows the network to detect unauthorized devices, rogue APs, and potential security threats, thereby enhancing the overall security posture of the wireless network.

The Received Signal Strength Indicator (RSSI) is a measure of the power present in a received radio signal. While it is commonly used in WLAN location-based services due to its simplicity and the fact that it doesn't require additional hardware, RSSI-based positioning is susceptible to environmental factors like multipath propagation and signal attenuation, leading to lower accuracy.

In contrast:

Angle of Arrival (AoA) determines the direction of the incoming signal, offering better accuracy.

Time of Arrival (ToA) measures the time it takes for a signal to travel from the transmitter to the receiver, providing precise distance measurements.

Time Difference of Arrival (TDoA) calculates the difference in arrival times between multiple receivers, enhancing location accuracy.

Upgrading access points (APs) from 802.11n to 802.11ac can offer higher throughput and improved performance. However, to realize these benefits, client devices must also support the newer standard. If the clients remain on 802.11n, they cannot leverage the advanced features of 802.11ac, such as wider channel bandwidths, higher modulation schemes, and increased spatial streams.

The CWDP-305 Official Study and Reference Guide emphasizes the importance of considering client capabilities during WLAN upgrades:

"When upgrading a WLAN, it's essential to assess both infrastructure and client devices. Upgrading APs without corresponding client support may not yield the expected performance improvements."

Therefore, in this scenario, the most likely cause of the unchanged throughput is that the client devices were not upgraded to support 802.11ac.

A WLAN scanner is a lightweight tool used during deployment and validation to verify channel utilization, detect SSIDs and APs, evaluate encryption schemes (e.g., WPA2/WPA3), and assess signal strength from APs in a particular area. It is not meant to perform in-depth frame analysis but provides a high-level overview.

From CWDP-305:

“WLAN scanners are useful tools for deployment validation and troubleshooting. They reveal AP signal strength, encryption in use, and can help verify if channel plans have been implemented correctly.”

— Reference: CWDP-305 Official Study and Reference Guide, Chapter on Post-Design ValidationandTroubleshooting

Comprehensive and Detailed Explanation:

Supporting over 300 devices with only two APs in a high-density environment like a convention center auditorium is inadequate.Simply adding more APs without a proper design can lead to co-channel interference and other issues.A comprehensive redesign is necessary to ensure appropriate AP placement, channel planning, and capacity to handle the high number of concurrent clients effectively.