For a site-to-site wireless connection, a Yagi antenna is the optimal choice due to its directional signal capability. This antenna type focuses radio waves in a single direction, enhancing range and minimizing interference from other sources. The design of the Yagi antenna allows it to capture more signal from a specific direction, which is ideal for point-to-point communication between two locations. References: Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) training materials.