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Data Recovery InformationHow Do Wireless Networks Work?
by:
John Maxim
Wireless networks activity victimisation radio waves instead of wires to transmit data between computers. That's the simple version. If you're curious to cognize what's going on in more detail, then it's all explained in this article.
Ones and Zeros.
I'm sure you cognize that computers transmit data digitally, victimisation binary: ones and zeros. This is a way of human action that translates really well to radio waves, since the computer can transmit ones and zeros as some kinds of beep. These beeps are so fast that they're outside a human's hearing range -- radio waves that you can't hear are, in fact, all about you all the time. That doesn't finish a computer from victimisation them, though.
Morse Code.
The way it works is a lot like Morse code. You probably already cognize that Morse code is a way of representing the alphabet so that it can be transmitted over radio victimisation a dot (short beep) and a dash (long dash). It was used manually for years, and became a great way of effort information from one place to another with the invention of the telegraph. Much significantly
for this example, though, it is a binary system, simply like a computer's ones and zeros.
You strength
think of wireless networking, then, as being like Morse code for computers. You plug a combined radio receiver and transmitter in, and the computer is able to send out its equivalent of dots and dashes (bits, in computer-speak) to get your data from one place to another.
All Just about Frequencies.
You strength
wonder, though, how the computer could possibly transmit enough bits to send and obtain data at the speed it does. After all, there must be a limit on how more can be sent in a second before it simply becomes useless nonsense, right? Well, yes, but the key to wireless networking is that it gets about this problem.
First of all, wireless transmissions are sent at really high frequencies, meaning that more data can be sent per second. Most wireless connections use a frequency of 2.4 gigacycle (2.4 billion cycles per second) -- a similar frequency to mobile phones and microwave ovens. As you strength
know, though, a frequency this high means that the wavelength must be really short, which is why wireless networking only works over a limited area.
In addition, wireless networks do use of a technique better-known as 'frequency hopping'. They use dozens of frequencies in the range they are given, and perpetually
switch between them. This does wireless networks more immune to interference from else radio signals than they would-be be if they only transmitted on one frequency.
Access Points.
The final step is once
it comes to all the computers on a network sharing Net
access. This is done victimisation a special piece of wireless instrumentality called an access point. Access points are more dear than wireless cards for one computer, as they contain radios that are capable of talking to about 100 computers at the same time, and sharing out access to the Net
between them. Dedicated access points are only actually essential for larger networks, although -- if you only have a few computers, it is possible to use one of them as the access point, or you could simply get a wireless router.
They Understand Each Other.
That's all well and good, then, but how does wireless instrumentality ready-made by entirely some companies manage to activity together once
this is all so complicated? Well, the answer is that there are standards that all wireless devices follow. These standards are technically called the 802.11 standards, and are set by the IEEE (Institute of Electrical and Physical science
Engineers). It is thanks to folk projecting to their standards that wireless networking is so easy and cheap to use today.
You Don't Need to Worry.
If all this talk of frequencies has you a little worried, you don't need to be -- wireless networking hardware and computer code handles all of this automatically, without you needing to do a thing. Don't think that you're going to have to tell one wireless device what frequency another is using, because it's simply not going to happen, alright? Wireless networking, for all its complex
workings, is actually far more simple to use than you'd ever expect.
Just about the author:
John is a earth recognized expert on wireless networking and network management. His journal
can be found at http://www.wirelessinternetonline.com
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