虚拟网络中的每个主机都被提供一个惟一的主机密匙，公共版本用于加密通信信道。
Each host within the virtual network is provided with a unique host key and the public version is used to encrypt the communication channel.
服务器创建数个虚拟信道供用户登录并互相通信。
The server creates several virtual channels that people log into to communicate with each other.
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