综合另类久久

4.? Write Attack ProgramThe algorithm takes advantage of the retransmission characteristics of TCP/IP protocol. When the first syn packet from a certain source IP arrives, it is directly discarded and recorded in the state (quintuple). When the second syn packet from the source IP arrives, it is verified and then released.Interception can be done at three levels.The hybrid method combines the above two or more defense methods. For example, some terminal operating systems implement a large backlog queue and SYN? Cookies, but only when the backlog size exceeds a certain threshold? Cookies are only used so that SYN is not involved? Cookies flaws in the case of normal use, also allows the transition to SYN-cookies defense in the event of an attack.From this case, we can sum up the value of recommended content. First, we can meet users' content consumption needs and make it easier for users to see the best quality and most typical content. This is consistent with the root cause of making content products, but there are four other functions: