It's important to understand computers for the same reason it used to be important to understand tall people: they run the world. Get a working knowledge with this Groupon.
Choose Between Two Options
- $50 for one 60-minute in-home computer training session ($100 value)
- $150 for three 60-minute in-home computer training sessions ($300 value)<p>
The computer specialist, Michael, will cover just a few topics per session, such as internet music or data backup, to ensure clients understand everything taught in the one-on-one session. Michael does not sell any backup services or software, but he may recommend additional upgrades or repairs to ensure proper computer function. For an additional fee, Michael can perform these repairs on a future visit. <p>
Wi-Fi: Surfing on Radio Waves
Without Wi-Fi, your smart devices would be a little dumber. Explore the surprisingly simple principles behind this technology with Groupon’s introduction.
With its territory increasingly overtaken by the Internet, radio may seem downright old-timey. But in fact, our experience of the Internet would be quite different without it. Wi-Fi uses two-way radio communication to transmit data, just like walkie-talkies, TVs, radios, and theatergoers trying to circumvent cell-phone bans. The process is relatively simple: a built-in wireless adapter in your computer, smartphone, or other device converts data from binary code—the language of computers that uses strings of 0s and 1s—into a radio wave signal, which it sends into the air using an antenna. A wireless router receives the signal, converts it back into binary code, and sends it to the Internet via a wired connection with your modem. (And, of course, the process also works in reverse.) Most routers can send and receive signals within a 100-foot radius, but there are more powerful models on the market.
There are a few differences between the two-way radio communication used by radio stations and that used to power Wi-Fi. Wireless adapters and routers transmit at much higher frequencies, which allow the signal to carry more data. Radio waves sent by wireless devices can also “frequency hop” to reduce interference and allow multiple devices to use the same Wi-Fi connection.
If the “Wi” stands for wireless, where does the “Fi” come from? According to the founders of the Wi-Fi Alliance, from thin air. A branding agency coined the term to stand in for what would otherwise have been a rather cumbersome bit of technical jargon; Wi-Fi was simply a catchy and logo-friendly invention. Later, some members of the alliance suggested the back-formation “wireless fidelity,” although it didn’t quite catch on.