CWNA Wireless Network Administrator

Answer - C - You should use a High-gain Yagi antenna to connect two buildings that are 1.5 miles apart, with data transfer speeds of 11 Mbps.

Key Takeaway: Yagi antennas are most often used on short- to medium-length building-to-building bridging up to 3.3 km. It is a directional antenna system consisting of an array of a dipole and additional closely-coupled parasitic elements. The dipole in the array is driven and another element, typically 5% longer, effectively operates as a reflector.