Exactprep CWDP-305 Questions

Comprehensive and Detailed Explanation:

An incorrect Frame Check Sequence (FCS) indicates that the frame was corrupted during transmission. This corruption can be due to various factors, but in the context of a WLAN, common causes include multipath interference and excessive collisions. Multipath occurs when RF signals reflect off surfaces and arrive at the receiver at different times, causing interference. Excessive collisions can happen in environments with high device density or overlapping coverage areas, leading to degraded performance.

In environments where access points (APs) are mounted on high ceilings (e.g., over 20 feet), it's essential to direct the wireless signal downwards towards the client devices on the floor. Patch antennas, which are directional antennas, are ideal for this scenario as they can focus the RF energy downward, providing better coverage and signal strength to the intended area.

The CWDP-305 Official Study and Reference Guide emphasizes the importance of antenna selection based on mounting height and coverage requirements:

"When APs are mounted on high ceilings, using directional antennas like patch antennas can help focus the RF energy towards the client devices, ensuring optimal coverage and performance."

In scenarios where physical access to the ceiling is restricted, such as when ladders are not permitted, using a laser distance measurer is the most accurate and cost-effective method to determine ceiling height. Laser measurers provide precise distance readings by emitting a laser beam to the target surface and calculating the time it takes for the reflection to return. This tool eliminates the need for estimations or indirect calculations, ensuring accurate measurements essential for WLAN design.

Comprehensive and Detailed Explanation:

Per-user Pre-Shared Keys (PSKs) offer several advantages over a single PSK used across an entire Extended Service Set (ESS):

User-Based Access Control:Assigning unique PSKs to individual users allows for better tracking and control over network access.

Simplified Key Management:If a user's PSK is compromised or they leave the organization, only their key needs to be changed, not the entire network's.

Option C:Per-user PSKs are not a standard defined or certified by the Wi-Fi Alliance; they are an implementation choice.

Option D:Mutual authentication is a feature of WPA/WPA2-Enterprise using 802.1X, not of PSK-based systems.