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Chapter I General ProvisionsCompared 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).陈启本来也没有多少想法，但是看到那各种颜色的**。FX已宣布续订旗下喜剧《更美好的事》第二季。阮清恬与任浩铭，看似没有交集的两人，在一个充满阳光的清晨，无意中相识了。他们的相识，其实是一场孽缘的开始—任浩铭的弟弟叫任浩杰，是阮清恬的同学，任浩杰早就喜欢上了阮清恬，并且义无反顾地投入到对阮清恬的爱慕之中。以后再也不关注这个无良作者了。