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The SYN-Flood attack is currently the most common DDoS attack on the network, It is also the most classic denial of service attack. It takes advantage of a defect in the implementation of TCP protocol. By sending a large number of attack messages with forged source addresses to the ports where the network service is located, it may cause the half-open connection queue in the target server to be full, thus preventing other legitimate users from accessing. This kind of attack was discovered as early as 1996, but it still shows great vitality. Many operating systems, even firewalls and routers, cannot effectively defend against this kind of attack, and it is very difficult to trace it because it can easily forge the source address. Its packet characteristics are usually that the source sends a large number of SYN packets and lacks the last handshake ACK reply of the three handshakes.神探斯特莱克第四季……希思美容整形医生高大尚（高亚麟）的妻子伊然（李舒桐）有严重多疑症，只要发现高大尚和女人在一起就怀疑他出轨，伊然没事儿就用网上《男人出轨评估表》评估他，高大尚的出轨指数竟然一直保持五颗星！伊然找了私人侦探调查跟踪，并亲自捉奸。深圳希思医院新来的法律顾问鲍小蕾（闫妮）屡屡被误会，高大尚颜面丢尽，离婚又重婚，最后终于净身出户离婚。倒霉的高大尚又遇上讹人的医闹，工作也丢了。自从秦始皇下诏修筑怀清台之后，寡妇清就成为巴蜀琴氏的骄傲，也是一块金子招牌。Or the lights specified in subparagraph (2) of paragraph 1;他拿了过去跟葫芦等人翻看。