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(2) The NioEventLoop event cycle is started, and the connection request of the client is monitored at this time.歇息一会，香荽看着红椒道：二姐姐可尽兴了？要是尽兴了咱们就回家。这是欺骗。如此也好，凭一件死物定终身，究竟不妥。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.Liu Guiduo told our gang to tie all the things that can float together and make rafts. There are some wood and bed boards on the boat. Nail a wooden raft and load the food on it. "