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During the establishment of a tcp connection, If the server returns syn and ack messages, The client does not confirm it for some reason. This is because the server needs to retransmit the syn + ack message and wait for the client's confirmation message until the tcp connection timeout. This state of waiting for the client to confirm the connection is usually called a half-open connection. The half-open connection will be kept in the connection table of the server until the connection is disconnected.When two motor boats cross and meet, thus posing a danger of collision, ships with other ships on the starboard side of the ship shall give way to other ships and, if circumstances permit at that time, avoid crossing the front of other ships.20,000 Yuan "Out of Control" Reporter Ma Xiaotian Peng Jieyun Editor Peng JieyunI have the confidence to mention divorce. It's a big deal to live alone.就算跟皇上有仇，跟张家郑家有仇，也不能放火啊。拿那位拾滩的老妪来说，就算她每天能拾出30文，从不间断，大概需要3个月的时间，才能攒出这一晚上的房钱。Coveting inferior shoes is cheap, resulting in foot damage.