计算机网络的分类方法很多,有按网络拓扑结构分类的,有按服务对象分类的,通常我们按网络规模,传输距离的远近把网络分为三种: 1.局域网(LAN:Local Area Network):通讯距离一般在几十公里范围之内,采用单一传输介质,应用在地域较为集中的一个企业、一幢建筑物内或一所校园里的网络。 2.区域网(MAN:Metropolitan Area Network):通讯距离在几十公里至几百公里,网络可采用不同的软硬件环境和通讯传输介质构成。 There are many ways to classify a computer network, classified according to the network topology and categorized by service object. Generally, we classify the networks into three types according to the network size and the transmission distance: 1. Local Area Network (LAN) Communication distance is generally within the range of tens of kilometers, the use of a single transmission medium, used in a more concentrated area of ​​?? a business, a building or a campus network. 2. Metropolitan Area Network (MAN: Metropolitan Area Network): communication distance of tens of kilometers to hundreds of kilometers, the network can use different hardware and software environments and communications transmission media.