Time is required for protocol information to propagate throughout a switched network. 协定资讯在通过一个交换网路时是需要时间的。
Leased lines provide direct point-to-point connections between enterprise LANs and connect individual branches to a packet-switched network. 在企业区域网路及连接个别分枝到分封交换网路之间租线提供了直接的点对点的连结。
