2, the base station access type: When the mobile cellular communications network access methods to form a wireless LAN, the communication between Acer AL10A31 battery the various sites to achieve through the base station access, data exchange interconnection. Each mobile station can not only through its own network switching center, WAN remote site to set up their own network. 3, HUB access type: Wireless Hub can set up a joint topology of wireless LAN has wired Hub Zuwangfangshi relative similar advantages. WLAN, on the basis of the structure can be similar to the ways of working of the exchange-type Ethernet Hub has Acer Aspire 4935 battery a simple network switching function.
4, center structure: Requires any two sites in the network can communicate directly. The wireless LAN of this structure is the general use of the common broadcast channel, MAC layer uses CSMA type multiple access protocol. The wireless LAN can be achieved in ordinary local area network based on Wireless Hub, wireless access station (AP), Wireless Bridge, Wireless Modem and Wireless LAN wireless card is the most common use. Laptop battery key technologies of wireless LAN, in addition to the infrared transmission technology, spread spectrum technology, network synchronization technology, there are some other techniques, such as: Asus A41-U36 Battery modulation technology, plus descrambling technology.
Enterasys RoamAbout wireless network launch solution for quickly, easily and economically to establish a wireless LAN, it can provide users with the reliability of the Ethernet-like. The RoamAbout 802.11 series consists of two parts: the full-featured exchange access points and 2.4 GHz direct sequence spread spectrum wireless Ethernet PC Card. The former can be unshielded twisted pair quickly and easily connect to the wired LAN; latter function is similar to all the standard wired Ethernet card, but it uses radio frequency instead of cables to create a LAN connection. Roaming users in the entire network, Dell RM791 Accu RoamAbout PC card can seamlessly switch to a different access point.