WTLS protocol is such a typical secure transport protocol, which has the upper functions.
WTLS协议就是一种实现以上功能的典型的无线网络安全传输协议。
Security service: the server offers transport and message level security functions.
安全服务：服务器提供网络传输层和消息层等多种安全管理机制。
Security service: the server offers transport and message level security functions.
安全服务：服务器提供网络传输层和消息层等多种安全管理机制。
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