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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.A5.1 Routine Inspection ItemsEvent is a procedural database object called by MySQL at the corresponding time. An event can be called once or started periodically. It is managed by a specific thread, which is also called "event scheduler".能够送来联姻，想必应该是个美人儿，大王请笑纳就是了。H1deal!《铁血女骑兵》讲述了在血雨腥风的抗日战争期间，云南一群少数民族的热血儿女为保卫民族尊严英勇抗战的故事。段钧豪出演一位热血正义的国名党特务队长林涛，与共党儿女演绎了一段互助、互敬又争锋相对的革命情感。