What is the WiFi?

What is the  WiFi?

Wi-Fi uses the term taken from WiFi Wireless Fidelity , which means the wireless connection , to refer to the possibility of wirelessly connect to the network without wires and the network is meant here the Internet or any computer network . A technique that is easy to use and faster technique to gain access to all the technology works on Wi-Fi WiFi radio frequencies such as wireless home phones . Currently used by many companies and Wi-Fi technology will become a barometer of wireless communication in the future .
They provide quick connections up to 100 times faster than communication via adaptive modem 56k dialup. In order to be able to access the Internet using Wi-Fi WiFi user needs to what is known as hotspots HotSpot.
It is a public areas allows wireless connectivity to the Internet through access points WiFi Access Points.
These access points provide Internet access to users' computers provided they do not exceed their devices after 100 to 200 meters with the possibility of providing service access points at the level of entire buildings such as airport or building an institution or a company or even the entire city by increasing the number of access points WiFi Access Points. It is necessary to provide the service provider called Internet Service Provider Wireless Wireless Internet Service Provider or short WISP which is comparable to Internet service providers who have got used to dealing with them , companies provide wireless fast internet connection via hotspots WiFi HotSpots across involvement in certain ways and to provide a user name and password.


What he needs in order to beneficiary related ?

The user needs to either a portable computer or mobile device Laptop PDA portable digital assistant that is running Windows 98 Windows or for the latest mobile computers compatible with IBM or IBM operating system OS 8.2 or newer laptop type of Macintosh . Most modern devices today contain purification WiFi WiFi required .
If your computer does not contain this technique can purchase Wi-Fi card and WiFi are usually installed in your computer may cost an amount not to exceed U.S. $ 100.
There are many cards from big companies such as Cisco and DLink , Sony and other companies . In the case of not wanting to install card techniques can be used to support communication via port USB.



Technology Wi-Fi WiFi:

Wi-Fi uses radio frequency WiFi and called b802. 11 and g802. 11 metrics which transfers data at 2.4 GHz and 2.4 GHz are used a method called OFDM and this shortcut Orthogonal FrequencyDivision Multiplexing Another measure 802 . 11a transmits data at speeds of up 5 GHz GHz5.


The level of security

As already say that the technology Wi-Fi allows the user to access Internet services via hotspot WiFi hotspots which points scattered in many places and therefore everyone has a computer Mobile Laptop or a digital assistant PDA Portable is available by card capable of working purify WiFi WiFi can access to services without supervision and that's where a lot of risk and the lack of means to reassure users of the level of safety of this technique.
The answer lies in the use of the WEP key is a shortcut Wired Equivalent Privacy This system provides protection through encryption before transmission over the air. Offers WEP key encryption are two types of 64-bit and 128-bit and the latter is safer and provides a high-level encryption is difficult to penetrate because it is at the level of the devices in the contact form
Open OSI Model in both the physical level physicist physical layer and the data link the level data link.



Access to the Internet from anywhere


You can imagine the possibility of access to the Internet and send and receive e-mail from anywhere in your office or your home and you're traveling at the airport or the train or plane , or even from your car, this is the motto of future technologies at a low price does not exceed $ 100 per month. Access to the Internet or the Intranet at work from anywhere without having to search for a place that has wires for networking ! ! . Imagine being able to follow your investments in the stock without having to go to the bank next door and the other will become available when the Wi-Fi technology to become available to all.
Soon we will see a lot of companies producing computing devices have been developed sticker on their products ( Wi-Fi technology is based WiFi CERTIFIED). This statement will make everyone take advantage of wireless access to the Internet . Currently conducting a lot of companies producing devices a lot of research in the field of fast access to the Internet wirelessly , for example, Intel Corporation and one of the largest producers of processors allocated millions of dollars in technology Wi-Fi to make it capable of producing devices equipped with Wi-Fi , and this will make the cost of such devices low and accessible to everyone . Initial reports indicate that in 2004, selling 30 million device technology is based Wi-Fi WiFi