CWNP Updated CWDP-305 Exam Questions and Answers by ingrid

Antenna gain is a measure of how well an antenna directs or concentrates radio frequency energy in a particular direction. Higher gain antennas focus energy more narrowly, resulting in longer range and better signal strength in the targeted direction.

4λ Dipole:Typically offers modest gain and is omnidirectional, making it unsuitable for high-gain requirements.

Yagi:Provides moderate directional gain, generally up to around 20 dBi.

Horn:Offers directional gain, but usually not exceeding 20-25 dBi.

Dish:Parabolic dish antennas are designed for very high gain applications, often exceeding 30 dBi. They are ideal for point-to-point links over long distances.

Therefore, to achieve a gain of 35 dBi, a dish antenna is the appropriate choice.

For accurate deployment of access points in a multi-floor indoor environment, providing a camera and marking tools is essential. A camera allows the installation team to reference visual cues from the design, ensuring APs are placed in the correct locations. Marking tools help in identifying precise mounting points on ceilings or walls, facilitating adherence to the design plan. These tools, combined with the design documentation, enable the installation team to execute the deployment accurately, maintaining the integrity of the WLAN design.

In stadium environments where aesthetics are crucial, installing APs in enclosures under seats or on handrails is a common practice.This approach conceals the APs, maintaining the venue's visual appeal while ensuring optimal wireless coverage.

The CWDP-305 Official Study and Reference Guide discusses the importance of aesthetic considerations in WLAN design and recommends discreet installation methods in public venues like stadiums.

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.