First is the definition of this Acknowledgment or ack; both SOAP stacks must understand what an ack is: what it looks like, what it means, and how to send it.

首先是Acknowledgment或者ack的定义；两个soap堆栈都必须理解ack是什么：其像什么，它意味着什么，以及如何发送它。

youdao

So to complete the scenario, upon receipt of this ACK, the sender resends Message 2 and eventually gets an ACK, as shown in Listing 4 below.

因此完成这一场景，一收到这个ACK，发送方就重新发送Message 2且最终获得一个ack，如下面的清单4所示。

youdao

The tcp_input () routine on the client side processes the SYN ACK packet, and calls tcp_output () to send an ACK packet back to the server.

客户端上的 tcp_input () 例程处理 SYN ACK 包，并调用 tcp_output () 将 ACK 包发回到服务器。

youdao

Guide and sea captain Alec Griswold, owner of ACK Kayak in Nantucket, Mass.

FORBES: Magazine Article

There could even be (ack) sponsored questions, I suppose.

FORBES: New Facebook Status Update Question Today: 'What Are You Thankful For?'