WiFi technology is designed for operation at short distances and simultaneously at high speeds. This is one of several wireless data transfer technology. In addition to the WIF are also popular WiMax and Bluetooth. Each has its own specific sphere of action. For example, WiMax can transmit data at great distances. In order to get rid of wires within a separate apartment is the best WiFi. The most common are three modifications of the standard - IEEE 802.11a, IEEE 802.11b and IEEE 802.11g. Its name can be deciphered as follows: Wireless Fidelity, or wireless fidelity, or accuracy.
It is worth to know something about them, because we need them to live long and live. In addition to live with them is easier than without them. To begin with, that the wires are obsolete. Just like 30 years ago, they mix under my feet and cry at the unimaginable knots. Yet the solution to this problem has existed for a long time. This wireless radio connections. It's really very convenient. No need to always stick somewhere forever breaking the cable connects. No need to break down and scraping the walls of cable homes and offices. Air instead of wires - it's that easy!
Today there are several wireless protocols: Bluetooth, WiMax, or types of transmission for mobile phones. WiFi technology is designed for operation at short distances, but with high speeds of data transfer .. The most common are three modifications of the standard - IEEE 802.11a, IEEE 802.11b and IEEE 802.11g.
Among them is the most popular IEEE 802.11b (usually under the term WiFi everyone guesses what this modification). The data used here the frequency band from 2.4 to 2.4835 GHz. The maximum speed is equal to 11 megabits per second. While the signal transmission distance is about 100 meters. Anyway, in the open sometimes manage to catch a signal at much greater distances, up to 300-400 meters. Two other modyfikacjei802.11a and 802.11g operate at frequencies of 5 and 2.4 gigahertz, and the maximum data transfer rate can reach 54 magabity per second. The latest modifications provide a shorter range signal propagation and require processors with much more power to the processing and encoding of information. Today we are working on 802.11n, which can provide up to 320 magabitów flowability per second.
The heart of the WiFi network is (literally) "access point" or access point. Formed around the area with a radius of 50-100 meters is called hot-spot, or Wi-Fi zone. Theoretically, two devices can be linked to avoiding the access point, but I get the full functionality that can not be.
Wireless Wi-Fi is so good for you, because it is designed to transmit data over long distances. Since this is a WiMax and mobile technologies. For it fulfills its function very well. For a user appeared in the network must only get in the radius range. All settings take place automatically. Work's no different from working in an ordinary Ethernet network. If there is a need for access to local resources can be password protected. Currently there are many devices that use Wi-Fi. First of all laptops. Wireless connection is even in relatively low-cost models. The device allows you to use Wi-Fi also can easily install yourself. Simply plug the cord into the phone, perform the recommended settings for local access and turns to the Internet zone. Gradually, the market appears Wireless MP3, printer. Works very interesting hybrid of a mobile and home phone.
Wi-Fi today is not only suitable for serious work, but also to have fun. For example, in the U.S. is widespread, "Hunter" playing under the name Wi-Fi hunting. A lot of people their cars or bikes revolve around the area and debris on the map where you can "eat" free Internet, or simply watch their local Internet cafes, apartments and even a preview of what has McDonald's. If you are the lucky owner of a laptop having a wireless communication device features Wi-Fi, look for Wi-Fi zone (zone of Wi-Fi) in your area.
In turn, private companies and government agencies eagerly await the delivery of special paint, which is to hold back waves of wireless connectivity before going outdoors. Obviously this is to limit access to local network resources and stop the spies, who would like to connect to WiFi transmission, and they can not stop the usual password and access codes. The manufacturer, EM-SEC argues that this wonderful paint creates a special electromagnetic barrier, through which the waves can not penetrate transfer data. In this way, to be safe government or corporate data. Just paint the entire building. I wonder whether the windows or paint?
