Keywords: benefit of repeater, negatives of repeater Router: Routers are devices which connect two tend to be systems that use similar protocol. A router contains hard ware and software. Routers operate at a network level of O. S. I model. Routers use logical and home address to connect two or more logically separate network. They make this connection by arranging the top network into reasonable network section (some times small sub network or sub nets). Each one of these sub..