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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.This bookKeeping initialization is very simple, that is, the top-level event type, the native event object, and the empty list of parent components are put on one object.秦瀚，青莲，你俩也不许吃了。该剧讲述的是发生在不远的未来，交织于网络虚拟世界和现实世界的故事，它集惊险、警匪、侦破、言情于一身。公元2035年，有线、无线宽带网络融为一体，覆盖整个地球。早在20世纪末期，虚拟现实就出现在电脑游戏中，“有机分子电脑芯片”和“大脑传感器”的研究成功，使整个互联网完全实现虚拟化。人们在虚拟世界里可以看到、听到、嗅到、感觉到由数字程序设定的一切，一个全球范围内有秩序的网络虚拟世界已经与现实世界并行存在。“虚拟生活”已经成为人们生活中不可或缺的一个重要部分……那个残酷年代，一个个国术宗师、大师、甚至初学者，站了出来，用血肉之躯誓死捍卫一个国家，一个民族最后的尊严和气节。光头立刻将火把递给后面的人，上前恭恭敬敬作揖：毛公子。钉钉超级发布会