Public key infrastructure enables the public network and Internet subscribers to communicate safely.

公共密匙基础设施使公共网络和互联网用户相互能安全地通信。

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At the same time, P2P application consumes the majority of the bandwidth, causing connection circuit capacity expansion failed to catch up with the demand of Internet subscribers.

同时，P 2 P等应用占用了大量带宽资源，使运营商网间电路扩容进度跟不上用户对互联网带宽的需求。

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At the same time, P2P application consumes the majority of the bandwidth, causing connection circuit capacity expansion failed to catch up with the demand of Internet subscribers.

同时，P 2 P等应用占用了大量带宽资源，使运营商网间电路扩容进度跟不上用户对互联网带宽的需求。

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