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江南佳丽地，金陵帝王州。[All-round Introduction to Weightlifting]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."Can afford to lose" seems to be a low profile, but in fact it is not easy to do it. What can really afford to lose is either young enough or has a sufficient reserve of resources. This is often a paradox in investment. The more you can afford to lose, the better your mentality will be, and the less likely your behavior will be to deviate. On the contrary, the more you can't afford to lose, the more you want to gamble and turn over the big ones as soon as possible. Without jumping this psychological trap, it is difficult to really form an investment consciousness.3. Abstract Factory Model现在看似汉魏两军是在对峙当中，彼此似乎奈何不了对方。