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If an attacker sends SYN packets quickly with their own undisguised IP address, this is a so-called direct attack. This attack is very easy to implement because it does not involve spoofing or modifying packets below the user layer of the attacker's operating system. For example, he can simply send many TCP connection requests to implement this attack. However, for this attack to work, the attacker must also prevent his system from responding to SYN-ACK packets because of any ACK, RST, or ICMP (Internet? Control? Message? Protocol) will cause the server to skip the SYN-RECEIVED state (go to the next state) and remove the TCB (because the connection has been successfully established or recycled). Attackers can do this by setting firewall rules, causing the firewall to block all packets (except SYN) to reach the server, or causing the firewall to block all incoming packets so that SYN-ACK packets are discarded before reaching the local TCP handler.在《绝代双骄》原著小说中，苏樱出现得非常迟，小说这样写，并没有什么问题，但是如果放到电视剧中，那问题就大了，等到接近三十集的时候苏樱才出场，对于大多数观众来说，恐怕都是很难接受。话说天下大势合久必分，分久必合。历经春秋战国数百年的征伐兼并，崛起西方的强秦终于在秦始皇嬴政的统领下横扫六国，一统江山。怎奈秦王朝不知偃旗息鼓，休养生息，反而以苛法暴政徭役天下，最终令秦王朝二世而亡。以陈涉、吴广为发端，四夷强梁揭竿而起。出生于沛的刘季在萧何、曹参、樊哙、周勃等人的拥戴下成为割据一方的小霸主。他带领兵马投靠楚国贵族之后项梁帐下，和孔武勇猛的项羽分路大战秦兵。当秦王朝土崩瓦解之际，一代豪杰项羽自立为西楚霸王，雄霸天下。不甘挫败的刘邦在张良、陈平、韩信、英布、彭越等名臣良将的辅佐下，与楚军展开最终的惨烈对决。顿时惊掉一地下巴，黄豆兄弟几个更是吓了一跳——乖娃居然骂人了。