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IEEE802.11委员会根据其无线局域网(LAN)规范制订了一个新的无线LAN标准,以更好地为移动通信用户和销售商服务。该标准的要点是: □多种物理媒体——包括跳频和直接序列扩频无线电以及红外光波;在将来还将增加经确认的其它媒体。 □与物理层无关的通用MAC(媒体接入控制)层——所有的802.11依从无线LAN都采用CSMA/CA算法,这种算法与以太网CSMA/CD MAC层算法相似。
The IEEE 802.11 Commission has developed a new wireless LAN standard based on its wireless local area network (LAN) specification to better serve mobile subscribers and vendors. Key points of the standard are: • Multiple physical media - including frequency hopping and direct sequence spread spectrum radio and infrared light waves; additional confirmed media will be added in the future. □ General MAC (Media Access Control) layer unrelated to the physical layer - All 802.11 compliant wireless LANs use the CSMA / CA algorithm, which is similar to the Ethernet CSMA / CD MAC layer algorithm.