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your cable or home phone provider, you can buy a wireless router that uses the WiFi standard, and if your computer has a WiFi network card, you'll be able to connect your computer to the router and thereby connect to the Internet!  In the case of the wireless printer example, the printer is not connected to the Internet, so the wireless connection you're making is simply to allow your computer to communicate with your printer to avoid the need to use a cable.


What does Wi-Fi stand for?
You'll often read that it stands for "Publish PostWireless Fidelity," however, that's actually not the case.  It's actually said to be a play on words to mirror the commonly used term "Hi-Fi," and is simply a more consumer friendly term referring to the wireless networking IEEE 802.11 technology.  There are a number of version of this standard that you may have heard of, including 802.11a, 802.11b, 802.11g, and 802.11n.  Generally speaking, these represent different speeds and security standards.  Newer versions are typically backwards compatible, which means that if you buy an 802.11.g router, it will still work with your older computer than may only have the 802.11b standard.  The same logic applies to prepaid WiFi, as prepaid is simply a payment option.