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When you click on the character with the mouse, he will also talk to you: "Hello, I'm Mark, shall we go for an outing together?" .By Abby NormanSource authentication and resource isolation, that is, when the client and the server establish a reply, the source of the request is authenticated as necessary, and the authentication results are formed into a reliable white list or blacklist, thus ensuring the effectiveness of the server in processing services. If there are enough hackers and broilers and the authenticity of forged data packets is high, a better countermeasure effect can only be achieved by improving the processing speed and traffic throughput of the server.DDoS Attack and Defense: From Principle to Practice (Ⅱ)世子夫人艰难地对小葱挤了个笑脸，结巴道：将……将军，息……怒。Second handshake: when the server receives syn packet, it must confirm the SYN (ack=j+1) of the customer, and at the same time it also sends a SYN packet (syn=k), that is, SYN + ACK packet. At this time, the server enters the SYN_RECV state;