In large enterprise WLAN deployments, efficient IP address and VLAN assignment is crucial for scalability and performance. Common and recommended methods include:
Static VLAN Assignment per SSID:Each SSID is mapped to a specific VLAN, allowing for straightforward traffic segregation.
Dynamic VLAN Assignment via AAA:Utilizing RADIUS servers to assign VLANs based on user credentials or group memberships provides flexibility and centralized control.
VLAN Pooling:Assigning IP addresses from multiple VLANs in a round-robin fashion helps distribute clients evenly and prevents DHCP exhaustion.
However, assigning VLANs based on real-time radio signal metrics like RSSI or SNR is not a standard or recommended practice. Such metrics are variable and can lead to inconsistent VLAN assignments, complicating network management and potentially affecting client performance.
Reference: CWDP-305 Official Study and Reference Guide, Chapter on Infrastructure Design

In outdoor WLAN deployments, environmental factors such as moisture, dust, and temperature fluctuations can adversely affect networking equipment. To protect access points from these elements, NEMA-rated enclosures are utilized. These enclosures are designed to safeguard equipment against environmental hazards, ensuring reliable operation in outdoor settings. Indoor deployments typically do not require such protective measures, making NEMA enclosures a distinctive requirement for outdoor installations.
Polycase
Reference: CWDP-305 Official Study and Reference Guide, Chapter on Infrastructure Design

When working in elevated environments, such as installing APs on ceilings higher than standard heights (e.g., warehouse or industrial sites), safety becomes a critical priority. According to the CWDP-305 Study Guide, proper personal protective equipment (PPE) is essential and typically includes a hardhat to protect from falling objects, a high-visibility vest to ensure visibility among other workers or moving machinery, and a body belt or harness when working at height. These safety requirements are commonly enforced by OSHA and are also discussed in wireless site survey preparation sections.
Reference: CWDP-305 Study Guide, Chapter on Advanced Site Surveys - "Survey safety considerations and appropriate use of PPE"
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Microwave ovens operate at frequencies around 2.45 GHz, which can cause interference with Wi-Fi signals in the 2.4 GHz band. During lunch hours, increased use of microwaves in the break room can lead to intermittent Wi-Fi connectivity due to this interference.
Reference: CWDP-305 Official Study Guide, Chapter on ProtocolandSpectrum Analysis

An active site survey involves connecting a client device to the WLAN and measuring various performance metrics such as throughput, latency, and roaming behavior. This type of survey is essential for validating that roaming is functioning as intended, as it allows the surveyor to observe the client's ability to maintain a stable connection while moving between access points.
Reference: CWDP-305 Official Study Guide, Chapter on Post-Design ValidationandTroubleshooting