当前所有的主流网络技术都是共享媒体式网络:一个网段中所有结点分配全部可用带宽。而下一代的网络技术,例如交换式以太网,全双工令牌环和异步传输模式(ATM),则都是交换式网络。 在交换式网络中,每个结点都能获得全部的网络可用带宽。在下一代以太网和令牌环网中,各结点可以并且应该认为属于所在网段。在这类体 All of the current mainstream network technologies are shared media networks: All nodes in a network segment allocate all available bandwidth. The next generation of networking technologies, such as switched Ethernet, full-duplex token ring and asynchronous transfer mode (ATM), are switched networks. In the switched network, each node can get the full network bandwidth available. In next-generation Ethernet and Token Ring, each node can and should be considered as belonging to the network segment. In this type of body