CWNP Updated CWDP-305 Exam Questions and Answers by octavia

IEEE 802.3at (PoE+) provides up to 30 watts of power per port. To determine how many devices can be supported with a total budget of 740 W:

740 W ÷ 30 W per device = 24.67

However, due to real-world power overheads and cable losses, it's safe to estimate each device may draw up to ~25–30 W. Most vendors recommend a planning budget of around 25–28 W per 802.3at device.

Safe calculation using full 30 W:

740 ÷ 30 = 24.6 → you could theoretically power 24, but for guaranteed power availability considering margin, most designs plan for:

740 ÷ 40 = 18.5 → about 18 devices conservatively

Answer: 18 devices can certainly be powered.

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

Project parameters in WLAN design software typically include requirements and constraints like:

Minimum required signal strength (e.g., –67 dBm for VoIP)

Minimum required SNR

Desired data rate coverage

These are configured before design work begins and guide how AP placement and coverage will be modeled.

From CWDP-305:

“Project parameters such as minimum signal strength, data rate, and required SNR must be defined before the actual placement of access points. These values define the target RF environment.”

— Reference: CWDP-305 Official Study and Reference Guide, Chapter on Wireless Design Process

In high-density environments with limited DHCP address pools, it's crucial to manage IP address allocation efficiently. Reducing the DHCP lease time to a shorter duration, such as 20 minutes, ensures that IP addresses are recycled more frequently. This approach minimizes the risk of address exhaustion by promptly reclaiming addresses from devices that disconnect or become inactive. While adjusting client timeouts and maximum client limits can help manage network load, they don't directly influence DHCP address utilization.

In high-density environments like stadiums and convention centers, the presence of large crowds significantly impacts Wi-Fi signal propagation.Human bodies, composed mostly of water, absorb and attenuate radio frequency (RF) signals, especially in the 2.4 GHz and 5 GHz bands commonly used by Wi-Fi.This absorption leads to reduced signal strength and potential connectivity issues during events when the venue is filled with people.

Designing a WLAN for such environments requires careful consideration of crowd density and its impact on RF signals.Strategies may include increasing the number of access points (APs), using directional antennas to focus coverage, and conducting site surveys during events to assess real-world performance.