...起来,一个传输实体似乎只需向目的机器发送一个连接请求(CONNECTION REQUEST)TPDU,并等待对方接受连接(CONNECTION ACCEPTED)的应答就足够了,但当网络可能丢失、存储和出现重复分组时,问题便出现了。
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However, the application is not notified that a connection has been accepted before data is received. That means a client could connect to your server and not send any data.
当缺少一种机制来通知你的应用程序所发生的这种情况:“连接已经建立了,正在等待客户端数据”,这将意味着有可能出现客户端只发出连接请求,但是不发送数据。
Accept_callback : the function called by the event system when a connection is accepted.
accept _ callback:当接受连接时,事件系统调用此函数。
The one selected in Figure 23, extssh, is generally accepted as more secure and preferred over the other connection types.
一般采用 图 23 中选择的 extssh,因为与其他连接类型相比,它更安全。
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