The major exception is being on a switched network segment.

主要例外情况发生在交换网段上。

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Packet Switching: The Internet is largely a packet switched network.

分组交换：因特网实质上是一个巨大的分组交换网络。

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Interpret the output of various show and debug commands to verify the operational status of a Cisco switched network.

通过解释各种情况下SHOW和DEBUG命令的输出来确定思科交换网络的工作状态。

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When I travel I studiously avoid making and receiving voice calls over the public switched network because of the costs.

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For one thing, the genius of the packet-switched network means new VoIP services can reach every user worldwide without any specific infrastructure investment.

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Why did the phone companies cling to expensive switched network standards even as packet-switched voice grew robust enough to deliver acceptable fidelity at a much lower cost per connection?

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