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If an attacker sends a large number of SYN requests with fake source addresses, the server side will consume a lot of resources to handle this semi-connection, and saving traversal will consume a lot of CPU time and memory, not to mention retrying SYN + ACK on IP in this list. TCP is a reliable protocol, and messages will be retransmitted at this time. The default number of retries is 5. The interval time of retries is doubled from 1s to 1s + 2s + 4s + 8s + 16s = 31s respectively. After the fifth time is sent out, it will take 32s to know that the fifth time has timed out, so the total is 31 + 32=63s.二人正说着，胡宗宪引两弗朗机人前来港口。这是我家的马车，在下表妹和妹妹都在车中，顺道送秦姑娘回去的。The third adapter mode is the adapter mode of the interface, The adapter for the interface is as follows: Sometimes we write an interface with multiple abstract methods, When we write the implementation class for the interface, All methods of the interface must be implemented, This is obviously wasteful at times, Because not all methods are what we need, Sometimes only a few are needed, In order to solve this problem here, we have introduced the adapter mode of the interface. With the help of an abstract class, the abstract class implements the interface and all methods. However, we do not deal with the original interface, but only get in touch with the abstract class, so we write a class, inherit the abstract class and rewrite the methods we need. Take a look at the class diagram:　　华纳兄弟影片公司与导演温子仁联手为您呈现波澜壮阔的动作冒险电影——《海王》！横跨七大洋的广阔海底世界徐徐展开，给观众带来震撼十足的视觉奇观。本片由杰森·莫玛领衔主演，讲述半人半亚特兰蒂斯血统的亚瑟·库瑞踏上永生难忘的征途——他不但需要直面自己的特殊身世，更不得不面对生而为王的考验：自己究竟能否配得上“海王”之名。陆小婷（张延饰）是一个青春亮丽的芭蕾新星，对爱情充满浪漫憧憬。在一次主演舞剧《天鹅湖》时，与即将大学毕业的丁亚刚（姜武饰）邂逅，两人执着而热烈地相爱了，并偷偷地结婚。丁亚刚悲痛自责，答应照顾小菊一辈子，并携小菊回到了东北林场，简朴而清贫地生活在一起。 　　此时小婷已身怀有孕，孤身一人来到丈夫生活过的城市深圳，并生下儿子小强。正当小婷在南方只身奋斗时，丁亚刚在北方赖以生存的林场也被山火吞噬，而他与小婷的儿子又不幸患上了肾衰竭，为此故人不期而遇，爱恨交织…