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When you get a router, the modem then is hooked up to it. The computer is no longer hooked up to the modem. The computer gets hooked up to the router.
The modem sends the information to the router, and since you'll have a wireless router.. a wifi signal is automatically sent out and then anything connected to the router also gets the information. Information in this case is internet.
The router, routes information to multiple things at once..
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