单词ack-
网络: 确认(acknowledge)；应答；确认帧
Most TCP sessions start with one endpoint sending a SYN packet, to which the other party responds with a SYN -ACK packet.
我们知道，绝大多数的TCP会话的建立，都是通过一端先发送一个SYN包开始，另一方则回发一个SYN-ACK包的过程。
At this point, the server allocates the resource for the connection and acknowledges this by sending a COOKIE-ACK to the client.
现在，服务器要为这个连接分配资源，并通过向客户机发送一个COOKIE-ACK报文对其进行响应。
The ACK request needs to be configured just like the INVITE request created previously.
ACK请求需要像前面创建的INVITE请求那样配置好。
He went over and found a bl ack and white dog in a tr ap.
他跑过去发现一只黑白相间的小狗被困在陷阱里。
As mentioned earlier, the sending side must agree to continually resend a message until it receives an ACK for that message.
正如前面提及的那样，发送端必须同意持续重新发送消息直到它收到该消息的ACK。
Ack-Requested: This element lets the client determine whether an acknowledgement should be returned for a message sent.
Ack-Requested：这一元素允许客户端来决定对于发送的消息是否需要确认。
In the case of a request-response messaging pattern, you can piggy-backthis ACK on one of the response messages.
在请求-响应消息模式的情况下，可以在响应消息上piggy-back这个ACK。
Therefore, most connection - oriented, reliable protocols allow multiple packets to be sent before an ACK is received.
因此大部分的连结导向、可靠的协定在收到ACK之前，允许传送多个封包。
The server responds with an INIT-ACK, which includes the cookie (a unique context identifying this proposed connection).
服务器使用一个INIT-ACK报文进行响应，其中就包括了cookie（标识这个连接的惟一上下文）。
The reasonable shielding parameters for a sub-interface crack to an interface cr ack are investigated.
讨论了界面下裂纹对界面裂纹干涉的合理屏蔽参数问题。