A Wireless N card can be bought at any electronics store such as Radioshack, Bestbuy, Office Depot, and Walmart. They all have a different selection to choose from and each has their own in store aids that can help you choose what is right for you.
what is a wireless g card with bluetooth?
wireless n is a type of wireless internet ("wi-fi)
Yes.
The same as with wireless G card and G router.
What is the Intel WiFi Link 5100 802.11 Wireless-N Card ?
Yes.
If your modem has wireless interface, yes you can.
802.11 n
Yes. Wireless N routers are backward-compatible with wireless G cards. You will not get the performance benefits of N though.
It enables you to access a wireless network if you don't have a wireless card in your computer or devices.
Yes, it will. It will work with A, B, G, and N standards.
Yes, you can. Wireless N devices are reversely compatible with G networks.