How To Make Laptop Computer Wireless

The 802.11 standard, better known by the name of WiFi  is becoming more fashionable. It allows connecting a computer in the garden under the olive trees, LAN, or best surf without a wire. This system consists of two types of equipment: a wireless station, usually a PC equipped with a wireless network card and an access point (AP), which acts as a bridge between the wired network and the wireless network. This access point usually consists of a radio transceiver, a wired network card and a software bypass (communication) standard compliant 802.1g. The access point acts like a station that allows multiple hosts (machines) to connect. What can compose a mesh.

(Be aware that with a single access point, not a mesh but a star network, there may be a mesh where there are several access points connected to the wired network, but we leave the domestic domain) where several dozens of computers are connected. Wireless stations can be equipped with network cards formats 802.11 PCMCIA, PCI or ISA, or alternatives to the PC as a telephone handset. Today, with WiFi wireless technology, according to the standard 802.1g, a computer may be at a distance of 480 meters from the station. That should be enough to go surfing on the laptop in the garden. With guidance antennas, satellite type, it is possible to reach 7 miles without problem. This can be useful to link schools with each other for example, or give access to the internet for a university center for all laptop users.

Wi-Fi ™ can be mounted in two modes: infrastructure mode and ad hoc mode. In infrastructure mode, the wireless network comprises at least one access point connected to the wired network infrastructure and a set of wireless stations. This configuration is called all of basic services (Basic Service Set). There is also an extended service set. The complex consists of at least two sets of basic services which form a single subnet. In industry, most of the WLAN will need access to services supported by the wired LAN as file sharing, printer, Internet access. The ad hoc mode, also known as point to point, or set of basic services independent (English IBSS) is simply a set of wireless stations. They communicate with each other directly without connecting to a wired network without access point.

This mode allows you to simply create a wireless network where wired infrastructure does not exist or where such infrastructure is not necessary for the services expected. This structure is found in airports or train stations, or when access to the wired network is not possible or not allowed. In this case, we’re not dwell on infrared technology, which has two defects which are the short distance between the transmitter and receiver as well as the flow rate is very low. Similarly to the optical fiber that is not appropriate for the local network, because of its high cost and low mechanical flexibility.

Finally, the wired connections still exist, especially on highways communications between North America and Europe , as well as in cabinets routers and supercomputers, where there are a lot of fiber optics. The optical fiber can have a very high speed. It is immune to noise. With the powerline network, one can imagine that in his fridge may come years automatically pass control over the Internet … With the wireless network, you can expect to surf the net from anywhere in the world.

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