Archive for July, 2009

How Do wireless Work?

Posted in Uncategorized on 07/19/2009 03:55 am by

Wireless networks use radio waves instead of wires to transmit data between computers. Here’s how:
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The Binary Code: 1s and 0s

It’s well known that computers transmit information digitally, using binary code: ones and zeros. This translates well to radio waves, since those 1s and 0s can be represented by different kinds of beeps. These beeps are so fast that they’re outside the hearing range of humans.

Morse Code: Dots And Dashes

It works like Morse code, which is a way to transmit the alphabet over radio waves using dots (short beeps) and dashes (long beeps). Morse code was used manually for years via telegraph to get information from 1 place to another very quickly. More importantly for this example, though, it is a binary system, just as a computer system is.

Wireless networking, then, can be thought of as a Morse code for computers. You plug in a combined radio receiver and transmitter, and the computer is able to send out its equivalent of dots and dashes (bits, in computer-speak) to get your data from here to there.

Wavelengths And Frequencies

You might wonder how the computer can send and receive data at high speed without becoming garbled nonsense. The key to wireless networking is how it gets around this problem.

First, wireless transmissions are sent at very high frequencies, which allows more data to be sent per second. Most wireless connections use a frequency of 2.4 gigahertz (2.4 billion cycles per second) — a frequency similar to mobile phones and microwave ovens. However, this high frequency produces a wavelength that is very short, which is why wireless networking is effective only over short distances.

Wireless networks also use a technique called “frequency hopping.” They use dozens of frequencies, and constantly switch among them. This makes wireless networks more immune to interference from other radio signals than if they transmitted on a single frequency.

Internet Access Points

The final step for a wireless network is to provide internet access for every computer on the network. This is done by a special piece of wireless equipment called an access point. An access point is more expensive than a wireless card for 1 computer, because it contains radios capable of communicating with around 100 computers, sharing internet access among them. Dedicated access points are necessary only for larger networks. With only a few computers, it is possible to use 1 of them as the access point, or to use a wireless router.

Industry Standards

Wireless equipment from different manufacturers can work together to handle these complex communications because there are standards which guide the production of all wireless devices. These standards are technically called the 802.11. Because of industry compliance with these standards, wireless networking is both easy to use and affordable today.

Wireless Is Simple To Use

If all this talk of frequencies has you worried — relax. Wireless networking hardware and software handle all of this automatically, without need for user intervention. Wireless networking, for all its complicated ability, is far simpler to use than you might expect.

 

New Processors from AMD

Posted in Uncategorized on 07/16/2009 07:56 am by
Brand of one of the processors, manufacturers are coming back with a new desktop processor, the AMD. AMD X4 955 to II in the whiz-kid prodigy II processor and the AMD’s X4 945, also in a few days, some brand preapare AMD said the new processor. Intel requires the user to be able to give too many choices.

AMD will release the 8-processor, there are many processors running at the same time. AMD’s launch in June 2009 to 8 preapare processor. Keompyutekseu and the same time, AMD launched in 2009 in the competition.

Expected to be available in the 8-processor uses the socket AM3 processors. 8 processors from AMD and electronic – is a series of AMD processors. Electronics – AMD processors up to 45 of the 42 TDP 65w of power to the electricity can be used together effectively. 8-processor can be found at:

X4 905e to 1.Phenom II
X4 900e to 2.Phenom II
X3 705e to 3.Phenom II
X3 700e to 4.Phenom II
X4 605e to 5.Athlon II
X4 600E to 6.Athlon II
X3 405e to 7.Athlon II
X3 400e to 8.Athlon II

Faster than the others on the X4 processor 950e is the prodigy II. X4 905e 2,5 GHz clock frequency in prodigies II, 2 MB L2 cache, is 6 megabytes of L3 cache and 65 watts TDP. And in this brand new processor, the Athlon II slower in X3 400e. 2,2 GHz clock frequency, it, 1,5 MB L2 cache, L3 cache and 45 watts TDP 0 is mega bytes.

 

Intel Core i7 Processor

Posted in Uncategorized on 07/16/2009 07:54 am by

The world’s largest chip manufacturer Intel to create new products and always inovative and creative brand. With Intel’s Core, Core i7 processor, launching the next version, I do not think satiesfied Intel Core i7 processor and Intel Core i7 950 is the processor i7 975 XE.

If our first Core i7 processor, core i7 975 Core i7 950 and his brother, when compared with the clock speed is faster. Core i7 950, Core i7 940 at a rate just faster than the 2,93 GHz clock speed is 3,06 GHz clock speed. Besides that, Core i7 975 XE has a 3,33 GHz clock speed. If we the Core i7 975 XE and Core i7 965 XE when you compare, we neunboda Quick Core i7 975 XE Core i7 965 XE is a 3,2 GHz clock speed, can find the results.

The observer is a part of the Core i7 950 and Core i7 975 XE Intel Core i7 processors to replace the two versions is the latest version, the Core i7 940 and Core i7 965 XE neunitda. By this thing more and more information of Intel Corporation distincted.

Intel’s plan, the Intel Core i7 processor, Core i7 940 and Core i7 965 XE version of the old stock of the two to stop. Intel Core i7 940 processor will be supplied until the end of this year 2009. Intel Core i7 965 XE and of next year out of the midle, 2010 is supplied to.

So, you like people and for the previous version of the Core i7 processor, you must say goodbye to them.