What is Wi-Fi and What are Wi-Fi Hotspots?

Wi-Fi is the buzzword among technicians and not-so-tech people alike for very little time now. And 2hile this is the case, not everyone knows exactly what is means and what it stands for.

To begin with, Wi-Fi is a trademark of wireless technologies, is owned by the group known as Wi-Fi Alliance.

The group aims to improve interoperability, Wireless local area network (WLAN) products from the following IEEE 802.11 standards.

This technology is usually mobile PCs and more and more mobile phones and PDAs are designed
in Wi-Fi enabled. As a wireless network, Wi-Fi works far with Ethernet cable that is used on a computer on the other computer and the Internet.

The second language experts in the wireless LAN Board Wi-Fi Hotspot simply known as HotSpot. A Hotspot is any the public sector, offers a free or paid wireless Internet access.

Some of them refer only to a small area (such as hotel lobbies), while those that cover the entire city (such as municipal elections are hot).

While hotspots is cheap and even free Internet Connection, there are also security problems, in parallel with this technology.

Some hotspots are, intentionally or unintentionally unsecured, so that all data on the network unencrypted. As a result, malicious users can breathe (Monitor) data from other, are the same
Network.

But several solutions, such as the Virtual Private Network (VPN) is available, although they are not widespread because of the cost of implementing them.

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The History of Wi-Fi

Wi-Fi is a relatively new form of technology is the only the starting point to ensure that a wide following around the world. A considered one of the most important innovation in technology since the Internet came to the mainstream.

Because of IT, computers are now able to connect to internet and to other computers wirelessly.

Is the predecessor of today's Wi-Fi has developed somewhere in the at the beginning of the 1990s by the Netherlands-based company NCR Corporation / AT & T (later known as Lucent &
Agere Systems). WaveLAN, was originally planned to be used in cash registers.

Several competing standards prevented the immediate success with wireless networks. However, with development IEEE 802.11 standards and the release of its first -- Protocol in 1997, this technology has come slowly but surely in the mainstream.

Since then, several protocols have been released and several will not be issued to address issues such as the scope and speed.

The first protocol of 1997, is now known as legacy mode to work on the 2.4-GHz frequency. The
throughput and data transfer rate is slow by today's standards, with only 0.9 and 2 Mbps, or. 802.11 A and B came two years later in the year 1999 with the protocol faster speeds, while b broader spectrum.

Elements of the two were later merged in 2003, when the 802.11g protocol was released. The new protocol provides and reach the speed of b.

New protocols are currently under construction. In n, set be issued in mid-2009 offers greater speed and almost twice as high as the reach of a / b / g protocol. Another, 802.11y, will be published in mid-2008 has the same speed of g protocol, although y has the open space
as 5 km.

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