Wireless Network System for an IT Training Centre Essay

Wireless Network System for an IT Training Centre - Essay Example This information is then transmitted through the air with the help of a transmitter and received at the other end through a receiver and demodulated. Since both transmission and reception of the signals have to be carried out at the same point, therefore a device known as an ‘Access Point’ (AP) is used which is a simple transmitter/receiver or transceiver. By assigning different frequencies to different users many users can access the network simultaneously without interfering. As is evident, the access to a wireless network can be gained only if the users are having devices which have a wireless facility. These devices such as notebook computers and tablet PC’s are widely available in the market and their prices have fallen by large amounts in recent times making them affordable. Â  Depending on the designing technology used WLAN’s are mainly of three types. ‘Narrowband wireless LAN’s’, ‘Spread Spectrum wireless LAN’s’ and ‘Infrared wireless LAN’s’. Narrowband WLAN’s, as is understood from the name, use the narrowband signal for communication. Therefore the speeds achieved are low in this case but the problem of interference is greatly reduced as is the case with narrowband signals. The problem of low speeds is solved by the Spread Spectrum WLAN’s which use wideband signals. The drawback of this technology is that the number of users accessing an access point is lesser and the security is also weaker than Narrowband WLAN’s. However, in spite of these drawbacks, it is the most widely used technology. The infrared WLAN’s don’t find many uses as the speeds as well as the range, in this case, is very low. Infrared WLAN’s are used only when the devices and access points are placed close to each other and when they are in the line of sight. The requirement of devices to be in the line of sight is because RF signals cannot pass through opaque objects. Â