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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.隋末，瓦岗寨义军的营外忽然有人要与罗义认亲，罗义拒认，反诬是杨林派来的奸细。程咬金察出其中必有蹊跷，亲往南营视察。姜桂枝终于说出原委。原来，四十年前，罗艺赶考途中发病，被河南南阳姜家集员外带回家中调养，其女姜桂枝一见倾心，在父母应允下，与罗艺结为夫妻。后来，由于战乱，夫妻分离。罗艺因战功卓著成为隋朝大将，并另娶妻生子罗成。程咬金巧妙安排，使罗艺亲自出战，大败姜桂枝的花枪之下。罗艺理屈词穷，只得认错，结发夫妻重新团圆。郑兄弟今日有些失态了。如今天下太平，文人学子如过江之鲫，竞争自然激烈。Article 35 Fire protection technical service institutions shall publicize the qualification certificate, business license, working procedures, charging standards, charging basis, code of practice, qualification certificate of registered fire protection engineers, complaint telephone number and other matters in conspicuous positions in their business premises.Collected!“杨光”的身份依旧还是保安，但感情上却百般周折，与众多女演员发生各种啼笑皆非的纠葛，走了一个又来一个，反反复复，用他自己的话说是“感情大丰收”，特别是这回还给“杨光”与其中一位女友设计了吻戏，成为该剧一大看点。了许多，大有夺“杨光”的风头之势，坏的是平时不务正业混日子的“条子”走上了一条不归路，饱受身心煎熬，尝尽了苦头。 　　“杨光”的父亲“杨丰年”还是那个在家里闲来无事的老头，韩兆笑称老爷子没什么正经戏，净干些“拈花惹草”的事，杨少华说自己其实就是个活动背景，一辈子没受过骗的杨老爷子这回算是领教了骗子的高超骗术，把全部家当拱手相让，最终还是“杨光”这个大孝子替父亲要回了钱。大家是否还记得在《杨光3》的《捉贼记》一集中被人误认为偷车贼的“老七”，他的命运在《杨光4》中来了个大转折，不但找到了漂亮温柔的女朋友，而且还非常有钱，两人住在豪华别墅甜蜜的生活。