Understanding Wireless LAN and Wireless LAN Security System

Understanding Wireless LAN is a local computer network that uses a wireless data transfer media or wirelessly. Just as wireless Ethernet, Wireless LAN is user associated with the server via a radio modem. One of the forms of radio modem is used PC Card for laptops. Communication speed wireless LAN can reach a maximum speed of 3 Mbps. Characteristics of a flexible wireless technology makes wireless as one of the main technologies applied in the telecommunications network. Wireless LAN communication has the fastest growing and growing as a very important sector in the telecommunications industry. One application for the development of wireless data communication is wireless LAN. given the characteristics of a flexible wireless system to be implemented anywhere, such as offices, industry, hospitals and universities. In addition wireless system also offers a wide range of applications including communication between terminal PC applications and connection to the telephone network, for example wireless PABX. With these considerations, the wireless LAN can provide a cheaper installation costs in addition to the portable nature.

Wireless LAN technology
In principle, the construction of the wireless link to the wireless LAN implementations not only be done with the technology of radio frequency (RF) but also can use infrared technology. But at this moment more RF technologies developed for the needs of wireless systems. RF technology itself is divided into multiple access techniques, one of them is Multiple Access technique most often used by vendors as their wireless products access techniques, namely multiple access techniques FDMA, TDMA and CDMA. In implementing indoor wireless LAN use cellular architecture where the building will be divided into several cells, and each cell will have a wireless link. Area wireless coverage depends on several factors such as technology used, implementation environment, the speed of data

Network Security Systems Wireless LAN
Computer network security systems on the LAN cable will be lost when the network cable is cut or tapped. While on the wireless LAN, security will be lost if the data is sent without any method of protection. Prevention performance of the wireless data can be done using an encryption method or the method of spread spectrum transmission. Security can also be done by using the identification and validation terminals that will access the system. Without control of security, accesses like jamming package, airborne virus, tapping, etc., can occur and can not be detected by the bottom layer of the OSI (physical and data link). Therefore, that should be of concern is system-based computer network security wireless LAN