无线局域网是个好东西,尽管今天大多数供应商还仅仅宣称:无线局域网是对有线网的补充和扩展。但当无线局域网发展到一定阶段时,它就不会仅仅局限在一个补充的定位上,而会在一定程度上上升为与有线网的竞争关系。这一点,我们在固定电话和移动电话的发展上,可以清楚地看到。世界上各个国家在发展电话服务时,都是先发展固定电话的。在移动通信的需求和技术都长大成人后,移动电话以比固定电话更高的速度发展起来。在多数地方,移动电话的用户数是少于固定电话的;但在芬兰等少数地方,由于移动通信网非常普及和发达,移动电话也 Wireless LAN is a good thing, though most vendors today only claim that wireless LANs complement and extend the cable network. However, when the WLAN reaches a certain stage of development, it will not be confined to a supplementary location, but to a certain extent, it will compete with the cable network. At this point, we can clearly see the development of fixed-line phones and mobile phones. All countries in the world are developing fixed-line phones when they develop telephone services. After the demands and technologies of mobile communication have grown up, mobile phones have developed at a higher speed than fixed phones. In most places, the number of users of mobile phones is less than that of fixed phones; however, in a few places such as Finland, since the mobile communication network is very popular and developed, mobile phones