About Wifi

 About Wifi

When we talk about WIFI we refer to one of the wireless communication technologies used by more waves today. WIFI, also called WLAN (wireless lan, wireless network) or IEEE 802.11. WIFI is short for Wireless Fidelity, is simply a trade name.
Logo WIFI
Today we can find two types of communication WIFI:

    802.11b, which emits at 11 Mb / sec, and
    802.11g, the faster, 54 MB / sec.
In fact, speed and range (about 100-150 meters in hardaware affordable) make it a perfect formula for wireless internet access.
For a wireless network at home will only need an access point, which would connect to the modem, and a device that would connect WIFI in our unit. There WIFI terminals that connect to PC via USB, but they are PCI cards (which are inserted directly into the motherboard) the recommended, we can save physical space and work faster. For portable external PCMI cards can be found, although many of the devices and are sold with integrated card.
In either case it is advisable to keep the access point in a high place for the reception / emission is more fluid. Even if we find that our speed is not as high as expected, perhaps because the devices are not properly located or barriers may exist between them (such as walls, metal doors).
The network operation is quite simple, usually just connect your devices and install software. Many of WIFI routers (routers WIFI) include configuration tools to control access to information that is transmitted through the air.
But being wireless, it is difficult for someone to intercept our communications and have access to our information flow. Therefore, we recommend encrypting the transmission to broadcast in a secure environment. In WIFI this is possible thanks to the WPA, much safer than its predecessor WEP and new security features such as dynamic generation of the access key.
Exite For more advanced users can configure the access point to emit only certain devices. Using the MAC address, a unique identifier assigned devices during construction, and allowing access only to devices.
Finally, also worth mentioning the existence of wireless communities that allow free access to the public network by connecting with nodes located at different points, for example, in your city. This trend is not yet consolidated and has an unpredictable future, it is very likely that telephone companies are filed with this practice. To inquire about this issue and want more information, some sites of interest would be.