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四、计算机网络的结构当前,计算机网络的形态主要是局域网以及局域网的互连(局域网中的计算机不再单单是微机,也可以包括小型机,甚至中大型机).此外,还有两种特殊形式:联机系统(不过远程终端通常用微机仿真)和单台计算机的运程联网(或称单机远程访问.这种计算机一般起客户机作用的微机,只需用一条线路联网.)对于局域网,当然是使用局域网技术;对于后两种特殊形式,是使用广域网技术.
Fourth, the structure of the computer network At present, the main form of computer networks are LAN and LAN interconnection (LAN computers are no longer just a computer, can also include minicomputers, and even the mainframe.) In addition, there are two special Forms: On-line systems (though remote terminals typically use computer simulation) and single computer networked (or stand-alone remote access) computers that act as a client generally only need one line network.) For a LAN, of course Is the use of LAN technology; for the latter two special forms, is the use of wide area network technology.