You are the network administrator for the City of Joshua Texas. The city government offices are located in five buildings separated by a State Highway controlled by the State of Texas, a road controlled by the city, and a railroad controlled by BNSF. These five buildings house the city hall, the police station, the public works office, the animal shelter, and the fire station. The other four buildings must be connected to the city hall without the need to secure right of way permission from either the State of Texas or the BNSF railroad. The two means to achieve this are either a radio frequency link between each building and the city hall or a free space optics link.