Packets between two computers on the same network are kept on that segment and won't cause congestion on other segments. 同一网络上的两台计算机之间的包只在这个网段上传输，不会造成其它网段的拥挤。
To achieve a smaller timing delay, Class II repeaters can only connect to segment types that use the same signaling technique. 为了达到较小的时序延迟，第二类别的中继器只能连接具有相同的讯务技术之网段。
