Wi-Fi, what are Hot Spots

wifi-areaHot Spots are Wi-Fi coverage points, in which the internet signal is sent through radio waves instead of the conventional cables that required been plugged into the computer. This technology is from the company Wi-Fi – Alliance; this organization fulfills the established 802.11 standards, which were born according to the Nokia and Symbol Technologies alliance known as WECA. Later, it changed its name to Wi-Fi Alliance and its objective was to foment the technology via radio, meaning wireless, and also ensure the safety among equipments.

After that, in 2000, the company WECA started certifying its equipments with the IEEE 802.11b standards; this law was made to substitute MAC’s physical layers of transmission through Ethernet, due to the fact that communication of data through Ethernet is not much different to the wireless one, only in the packages it sends, the Wi-Fi trademark guarantees communications between equipments with certifications and norms established by Wi-Fi, this counts with different equipments, because since 2000 until now, they have a great list of production.

The devices used to connect Wi-Fi elements are the routers, access points, receptor cards, PCI cards and also USB. The access points word through a remote mode to the signal of radio signals, which are at a maximum distance of approximately 100 meters, this depends on the type of device you have, this receive the UTP signal through cable or also receive a weak signal of another router and amplify it.

Routers are the signal receivers of the signal of the Internet company’s service, which is, at the same time, in charge of providing support and solving all the problems that might be presented with the signal reception, included the control and extraction errors of the information, so it can be worked with the net levels; this device makes the signal repartition task to be very efficient.

After Routers, there is a wide variety of equipments and devices which accomplish the labor of signal distribution, these cannot handle the reception as the hubs do, which make it possible to centralize the net cables and amplify it, as switches; this is an analogue device of logic interconnection, meaning that it can build bridges so the data information can pass according to the MAC directions, unlike these other devices, which are much more simple and fulfill a low gamma function, included the local net performance.

Among the reception devices, they can be divided into three types: the PCI cards, the PCMCI cards and USB cards, which are added through the USB port, because they are the simplest kind there is and besides, it is the simplest one to plug, it also offers the possibility of plugging the calls with PreN technologies.

You could say that one of the disadvantages of using the Wi-Fi technology is that it carries a lower speed compared to the one of cables, that happens because there is interference and signal losses that the environment takes away. Nowadays there are programs dedicated to capture information packages, in a way in which the net password can be calculated and, in that way, be able of accessing to it, these WEP type passwords are, in theory, easy to get, based on the WPA or WPA2 standards.




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