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Compared with SYN cache method, SYN? Cookies technology does not need to allocate space at all when receiving a SYN. Because the most basic data that make up the connection state are encoded and compressed into the sequence number bits of SYN-ACK. For a legitimate connection, the server will receive an ACK message segment with a serial number (actually the serial number has been added by 1), then the basic TCB data will be regenerated, and a complete TCB will confirm that the data will be safely instantiated through decompression. This decompression can be successful even under severe attacks, because there is no storage load at all on the host side, only the load that calculates the encoded data into the ACK sequence number. The disadvantage is that not all TCB data can be added to the 32-bit sequence number segment, so some TCP options required for high performance cannot be encoded. Another problem is that such SYN-ACK message segments will not be forwarded (because forwarding requires complete state data).一场失败的银行抢劫案后,嫌疑人失踪,8名人质向两名警察讲述了不同的故事,案件变成了搞笑的谜团。赵锋愣住了：肃王府？刚才之前，肃王府还跟他没关系，眼下可不同了。Lin Nian is a "mentally retarded", impolite and vocal eccentric. No one knows whether he will be normal or "mentally retarded" next moment.还有，敌后地方那么大，怎么他也偏偏找到这来了？这情形，也是要从这庄院内捞些功劳了？呸，她和大哥黎水辛辛苦苦忙了这么些天，怎么能把成果拱手让人？可是，不想让归不想让，眼前的情势却有些不妙：胡钧能放手厮杀，她却不能。Console.log (a.getName ()); //aaAlthough it can weaken the connection between objects, if it is overused, it will make the code difficult to understand and maintain, etc.