Greyhound Lines, Inc. , usually shortened to Greyhound, is an intercity bus common carrier serving over 3,800 destinations across the United States, Canada, and Mexico.
In order for devices on the network to connect to the Internet, the router must be connected to a modem. Therefore, most routers have a specific Ethernet port that is designed to connect to the Ethernet port of a cable or DSL modem. A modem is a device that provides access to the Internet (see below). The modem connects to your ISP, which typically provides either cable or DSL Internet service.
This box is usually both a router and a modem. A modem is a device that negotiates the connection with your ISP through your telephone line while a router is a device that is used to connect two networks together, in this case your network to your modem. Traditionally modems were stand alone devices that can be connected straight to your computer or to a router.