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Since http is based on tcp, You need to complete a three-way handshake to establish a tcp connection before you can start http communication, Therefore, when http flood attacks are carried out, it is not possible to use forged source ip addresses to launch attacks. An attacker will typically use an http proxy server, Not only can the source be hidden from being traced, It also improves attack efficiency-after the attacker connects to the proxy server and sends the request, You can directly disconnect from the proxy server and start connecting to the next proxy server, At this time, the http connection between the proxy server and the target web server is still maintained, and the web server needs to continue to accept and process data. An efficient http flood attack should continuously send http requests for different resources and pages, and request resources that cannot be cached as much as possible (such as keyword search. User-related information, etc.)I hope my answer can help you!History宣布直接预订10集UFO题材剧《蓝皮书 Blue Book》，该剧由David O’Leary执笔，根据现实美国空军的研究计划所改篇，背景50-60年代。在当时美国兴起一股UFO的热潮，美国空军为调查UFO而成立了蓝皮书计划/Project Blue Book来作相关研究。剧集讲述一个聪明的大学教授J. Allen Hynek被空军招揽，并由他处理蓝皮书计划中多达数千的未解案件，每一集皆会引用真实的案件，把UFO事件与美国那段具神秘感的历史结合起来。一看之后，吕馨顿时惊讶道。　　Justin Kirk将饰演剧中亿万富翁兼天才Gideon Reeves，在带着孩子气的好奇心时，同时也有令人难以抗拒的魅力。在好友被谋杀后，决定要把原本的警察系统大大改变。在剧中他为警局开发了一个新应用 – APB，并提供各种高科技玩意给警员。混了这么久，这是他遇到的第二个不收钱的人，上一个是海瑞，不对，何永强也没收，不过那是因为他瞧不上这点钱。而且从今日的情形来开尹旭的为人和担当让他钦佩不已。