在WAN中，客户端通过点对点链路（point to point link）连接到电信运营商网络。点对点链路也称为租用线路。 点对点链路不使用ARP协议，因为在设置这些链路时，网络设备已获得了链路两端的IP地址，不需要ARP协议来实现IP地址和不同网络硬件地址的动态映射。
在这里概述的题目包括点对点链路，电路交换，分组包交换，虚电路，拨号服务，和WAN设备。
Topics summarized here include point-to-point links, circuit switching, packet switching, virtual circuits, dialup services, and WAN devices.
摩托罗拉还为在拥有许可证的频率上运行的回程链路应用推出了一种点对点的以太网桥接器，并且计划在今年年底前出货。
Motorola also announced a point-to-point Ethernet bridge for backhaul applications that operates in licensed spectrum and is slated to ship by year-end.
AT M网络是由一系列通过点对点atm链路或接口相互连接的AT M交换机构成的网络。
ATM networks are composed of ATM switches that are connected with point to point links and interfaces.
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