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理论与实践是不可分割的，实践决定理论，理论指导实践，实践是理论的最终目的，实践是检验真理的唯一标准……错了。The first packet discarding scheme will have a slight impact on the user experience, because discarding the first packet retransmission will increase the response time of the service. In view of this, a better TCP Proxy scheme has been developed. All SYN data messages are accepted by the cleaning equipment and processed according to the SYN Cookie scheme. The IP address that successfully established the TCP three-way handshake with the device is determined to be a legitimate user to join the white list. The device disguises the real client IP address, completes the three-way handshake with the real server, and then forwards the data. However, if there is no IP address that shakes hands with the device three times within the specified time, it is determined that the malicious IP address is blocked for a certain period of time. In addition to SYN Cookie combined with TCP Proxy, the cleaning equipment also has the ability to detect a variety of abnormal TCP flag bit packets, and identifies normal access and malicious behavior by returning unexpected responses to SYN messages to test client responses.苏赫和涩琪在高中时代相遇，约定好要考上同一个大学，再续青春的情谊，大学时代，苏赫爱上了漂亮大方的珍儿，而涩琪.. 和珍儿居然相爱了... 三个人的命运和爱情纠缠在一起，他们会有怎么样的结局呢？这要搁往常，连我自己也不信。故事讲述二百年后的未来，人类殖民太阳系。由于重力的影响，太阳系的人类逐渐分成了地球人、火星人和以小行星带为主的谷神星人，彼此之间的关系由于资源的争夺而变得紧张。警探Josephus Miller（托马斯·简 饰演）连同船长Jim Holden（史蒂文·斯崔特 饰演）与他的船员一起揭发了一个威胁秩序和平及人类生存的阴谋。