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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.芦苇、软木——十车。少女从屏幕上迸发出来，被奔放的想象所压倒的短篇动画On the other hand, if this View does not consume the down event, then the onTouchEvent () of the parent View will call back layer by layer to pass the down event to the parent View, so the consumption of the event is also a process of passing the event.这话无疑是个晴天霹雳，中军大帐内的诸侯众将大为震惊。在巴黎不久的将来，科技已征服最后的领域：破译真爱。通过深入分析用户的大脑数据，全新的约会应用“OSMOSIS”可以找到百分百匹配的完美对象，使“灵魂伴侣”这一概念变成现实。但是，让计算机算法决定你的一生挚爱是否需要付出代价？在换取永恒不朽的爱情时，技术可以访问你大脑的至深之处，以及心底最深的秘密…唯有灰烬几块即将燃尽的木柴，散出一缕淡淡的青烟在树林中飘散着，逐渐随风消散消散，直到完全不见踪影。