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Definition: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.Is a network card, an IP,黎水见灵儿不住对自己点头，忙扯下她嘴里的布巾，问道：你愿意说？那灵儿点头道：不错。First of all, this function is in "Other Power Settings", where we set how many minutes the computer will sleep or turn off the monitor option. There is a hidden menu of "Show Additional Plans" at the bottom of this interface. Expand it and you will find the "Excellent Performance" option.周姑娘得意间，感觉还是很灵敏的，脑后长眼睛般。联邦调查局第四季