Certified Wireless Network Administrator (CWNA) Practice Test 2025 - Free Wireless Network Administrator Practice Questions and Study Guide.

The purpose of the Fresnel Zone in a wireless bridge link is to ensure a clear line of sight for the effective transmission of radio signals. The Fresnel Zone is an area around the line-of-sight path between two antennas; it is shaped like an oval or elliptical zone and is critical because it represents the space in which obstacles can cause diffraction, leading to signal degradation.

If any obstacles, such as trees or buildings, infringe upon this zone, it can cause multipath reflections and signal loss, resulting in a weaker connection. Maintaining a clear Fresnel Zone helps minimize interference and maximizes the reliability and strength of the wireless link. Therefore, understanding and ensuring that the Fresnel Zone is clear is essential for the successful configuration and performance of wireless bridge systems.