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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).一名普通复员军人在偶然间发现保卫几百万人口生命的防洪大堤被一伙不法商人、黑社会、腐败分子做成“豆腐渣”工程后，勇敢地揭发并与这群人斗争到底，最后保住了该市几百万人的生命……The transformation of K12 discipline education institutions, relying on the original discipline system to enter the track of children's thinking ability training,　　日寇向我根据地发动疯狂扫荡，甄一然奉命紧急处理在押的政治、刑事嫌疑犯，而疾恶如仇的常发却试图枪毙嫌犯。甄一然严厉斥责常发，并命令常发释放所有犯人，待大扫荡过后再做处理。常发不服，打倒了甄一然的警卫员，并拘禁了甄一然。正是这种坚持，区别与以前的种种，所以他不会再像以前那样主动意识到错误，从而迅速和范增和解。Form: BuffetDuring the creation of an object by Spring, the dependent attributes (simple values, collections, and objects) of the object are set to the object through configuration