If the number of APs changes due to budget constraints, a complete redesign is required to reevaluate coverage, capacity, and performance expectations. Increasing transmit power or relying on 2.4 GHz is not a valid solution, as it can result in co-channel interference and poor roaming.
From CWDP-305:
"A design is based on specific coverage and capacity requirements. Any major change, such as reducing the number of APs, requires a full redesign to determine the impact and ensure that business requirements can still be met."
- Reference: CWDP-305 Official Study and Reference Guide, Chapter on Wireless Design Process

When deploying a WLAN that includes both WMM-PS (Wi-Fi Multimedia Power Save) certified devices and legacy devices that do not support WMM, it's important to understand the implications on performance and battery life.
WMM-PS, based on Unscheduled Automatic Power Save Delivery (U-APSD), allows client devices to conserve battery power by managing the time the device spends in sleep mode and reducing the need for frequent wake-ups.This mechanism is particularly beneficial for applications like VoIP, where timely delivery of packets is crucial.
However, legacy devices that do not support WMM-PS rely on older power-saving mechanisms, such as PS- Poll, which are less efficient.When both WMM-PS and non-WMM-PS devices operate on the same WLAN, the differences in power-saving capabilities can lead to inconsistencies in performance and battery life.
Specifically, WMM-PS devices may experience better battery conservation and performance, while non- WMM-PS devices may have reduced efficiency.
This scenario is addressed in the CWDP-305 Official Study and Reference Guide, which emphasizes the importance of understanding client capabilities and their impact on WLAN performance.
Reference: CWDP-305 Official Study and Reference Guide, Chapter on Designing for Specific Applications

Once the WLAN is validated and operational, the next step is knowledge transfer. Support staff must be trained on monitoring, troubleshooting, and configuration, while end-users benefit from understanding basic usage and policies. Executives and guests are not directly involved in daily operations.
From CWDP-305:
"Training should be delivered to IT support staff responsible for WLAN operations, and optionally to end- users for user-side clarity. This ensures ongoing support, proper use, and reduced downtime."
- Reference: CWDP-305 Official Study and Reference Guide, Chapter on Post-Design ValidationandTroubleshooting

Channels 116-124 in the 5 GHz band fall under the Dynamic Frequency Selection (DFS) range, which requires devices to vacate the channel if radar signals are detected. Proximity to airports increases the likelihood of radar interference, leading to potential disruptions in Wi-Fi service.
The CWDP-305 Official Study and Reference Guide advises:
"In environments near radar installations, such as airports, it's recommended to avoid DFS channels (e.g., 116-
124) to prevent service interruptions due to radar detection requirements." Reference: CWDP-305 Official Study and Reference Guide, Chapter on ProtocolandSpectrum Analysis

Outdoor antenna installations are particularly susceptible to lightning strikes due to their elevated positions and exposure to the elements.Lightning surge suppressionis essential to protect both the antenna and the connected equipment from the high voltages and currents associated with lightning-induced surges.
Implementing proper lightning protection involves installing surge protectors and ensuring adequate grounding of the antenna system. This not only safeguards the equipment but also enhances the overall reliability and safety of the wireless network infrastructure.
Reference: CWDP-305 Official Study and Reference Guide, Chapter on Infrastructure Design