If im planning to use a router will i need a wireless card on the host computer too? and also is there any way might have a built in router?
You only need a Wireless card if the router you are buying has wireless capabilities.
Also you need a wireless card/adapter for any computer that you do not want to run a ethernet cable to from the router.
If you run a cable
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Got a new phone from Verizon Wireless. If you switch too, we can both get a $25 Verizon Wireless Referral Rewards Card 
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A close-up image of a Wireless-N broadband connection card.
