Disadvantages of Wireless LAN system 1. There is a high signal attenuation rate, meaning that the "short-term signal." 2. have a high noise. 3. the need to share use of the same frequency channel. 4. There are also many individual manufacturers standards, problems with sharing. 5. the price of expensive wired networking. 6. not very high speed (Wireless LAN wireless network of 2549 (2006)-line.)Network MAN Metropolitan Area Network MAN stands is a network-level city which is the network that are often associated with each other only in the same district or multiple district close to the city. It is about 10 km to the network LAN network is a group of MAN to be connected into a larger band within the neighborhood. Designed to cover all cities/towns that may be on the same network, such as network, cable tv network, or a total of LAN network, several networks together. For example, within the University, or in the education system will be a MAN in order to connect to the LAN system of each Faculty together into the same broad network. The technology used in the network, ATM, FDDI, and SMDS MAN: a network MAN to come in the near future is to connect computers within a city together through technology Wi-Max (network of 2549 (2006)-line MAN.)
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