Typically, permanent virtual circuits are set up between multiple backbone switches and between switches and devices with heavy network traffic.

一般而言，永久性虚拟电路建在多个主干网交换机之间和交换机与网络信息流量大的设备之间。

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The elastic PBD blocks of the backbone bridge adjacent PS domains through multiple junction points, resulting in the enhanced elastomeric properties.

主链上弹性PB D段通过多个联结点与相邻的PS微区连接，提高了弹性体的性能。

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When application requests from multiple high-speed links converge at the backbone to vie for server bandwidth, server connections can quickly become saturated.

当来自多个高速链路的应用请求汇聚到主干网上争夺服务器带宽时，服务器连接很快就饱和了。

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Switches with built-in routing, also known as Layer 3 switches, are expected to catch on as router replacements once the boxes are equipped with WAN interfaces and support for multiple protocols -- two features backbone routers have long had.

CNN: Networking trends emerge for '99