Just as an ICS gateway has two IP addresses—one for the network and one for the Internet—so does a router. Most routers are sold for use with two-way broadband Internet access devices such as two-way cable modems and fixed wireless broadband services or DSL lines. Most of these devices connect to the computer via a 10BASE-T Ethernet port.
If you have a wireless network, connect the wireless access point or gateway device designed for your network to the cable modem or other broadband Internet device (some also work with analog modems). The wireless access point or gateway device will transfer data to and from computers on the wireless network and the Internet.
(Special Thank's : A part of Article; Upgrading and Repairing PCs, 15th Anniversary Edition, Scoot Muller).
When you use a router to share your Internet connection, the WAN port on the router replaces the network card connection originally used to connect your computer with the cable modem or DSL modem. All computers on the network connect to LAN ports and can share files and printers with each other as well as share Internet access.
As long as the router is running and properly connected to the cable modem or DSL modem, any computer connected to it can go online just by opening its email client or Web browser.If you have a wireless network, connect the wireless access point or gateway device designed for your network to the cable modem or other broadband Internet device (some also work with analog modems). The wireless access point or gateway device will transfer data to and from computers on the wireless network and the Internet.
(Special Thank's : A part of Article; Upgrading and Repairing PCs, 15th Anniversary Edition, Scoot Muller).