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When the client SYN packet arrives at the filter gateway, the SYN agent does not forward the SYN packet, but actively replies the SYN/ACK packet to the client in the name of the server. If the client's ACK packet is received, it indicates that this is normal access. At this time, the firewall sends the ACK packet to the server and completes three handshakes. The SYN agent actually replaces the server to deal with SYN attacks. At this time, the filter gateway itself is required to have strong ability to prevent SYN attacks.高大威大学肄业初入社会，谋得快递员一职，一次在孙凯瑞的激将下，赌输了客户夏雪的商品，从而被迫成为夏雪的免费员工，更是遭到消防队长-----夏雪的哥哥夏雨的蔑视。高大威特招进了消防队，被分配在搜救犬中队，而后与孙凯瑞、夏雨一起成为特勤尖刀队的“铁三角”。高大威误打误撞劝服轻生者，演习时更机智地救了被困孩童，成为特勤队的新星。在工厂救援中他的疏忽差点害死队友，在反思后快速成长，并开始尊重科学救援的理念。在后来的矿山救援中以命相抵生死救援，重新换得战友信任。特勤队经过一连串凶险的救援事件，新兵、老兵终于融为一体，队员之间建立了友情，高大威终于成长为消防精英。不知怎么地，蒯彻一开口，韩信就觉得似乎有些不对，蒯彻身上有些怪怪的。咳……咳……来人。王穷最先开口。Blacklist table structure:(2) Under the multi-core system, the resources of multi-core CPU can be fully utilized. That is, when I/O blocks the system but the CPU is idle, CPU resources can be used with multithreading.