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In order to use SYN? Cookies to calculate the SYN-ACK serial number (that is, SYN? Cookies), the host must first combine some local password bits, a data structure including IP address and TCP port number, SYN initial sequence number, and some index data identifying the password bits. An MD5 digest is generated on top of all the above bytes, and then some bits are truncated from the hash value to put it into the SYN-ACK sequence number. Since the size of the sequence number is about a quarter of the total hash value, this truncation is necessary, but usually at least 3 bytes of hash bits are used for verification, which means that there are still nearly 2 24 possibilities to guess and verify cookies without knowing the password bits. In order to send out the hash value, some bits of cookies will reduce the upper limit value of MSS (Maximum Segment Length) contained in SYN and affect the index bits that identify the native password bits in the hash value.我要我要，我心疼还来不及呢。……《白发魔女传》还能看，但是要说到是旷古烁今的新武侠，那就言过其实了。Chapter 2The TopLevelEvent is encapsulated to deal with browser exceptions. This is done on the worker thread.本剧展现的是1935年冬至1945年春，中国工农红军到达陕北后，以毛泽东为核心的中国共产党第一代领导人以无以伦比的胆略和才识，呼唤引导中国革命从国内战争走向民族解放战争的光辉业 绩。它真实全面地叙述了延安时期，中国共产党的完善和建设，人民军队的壮大与发展、中华民族文化的继承和弘扬，浓墨重彩地展现了毛泽东思想的形成和中国共产党第一代领导人的优良品格， 以及他们在斗争中培养形成的实事求是、独立自主、艰苦奋斗的延安精神。