There are a few types of routers. The most common are wireless and wired. Wired routers are connected to computers, printers and other devices via a RJ45 or network cable. The cable resembles a phone cord except the connectors on either end or larger. Wireless routers enables computers and other peripherials to connect via signal which is transmitted through the air. Wireless routers are best for multi-computer homes as it allows internet and home network connections throughout the entire home.