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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.费了好半天的功夫，好不容易才让韩信没有参与三国联合，避免与齐军作战。Note: Since View does not have a child view, onInterceptTouchEvent is not required to control whether the event is passed to the child view or intercepted. Therefore, when the event distribution of View calls super.dispatchTouchEvent (), the event is passed to its own onTouchEvent by default (equivalent to intercepting). Compared with the dispatchTouchEvent event distribution of ViewGroup, the event distribution of View does not have the third point of the four targets mentioned above.我明白，都是那个疯癫的徐海。The first contrast in the film comes from the introduction of the two main characters Neil and Todd after the opening ceremony. It uses the bridge where parents lead their children to greet Principal Nolan, which can clearly distinguish Neil's extroversion, self-confidence, perverse and enthusiasm from Todd's insider, taciturn, lack of self-confidence and depression (living under the shadow of his brother's glory). This kind of character setting is also for《电竞纪元》是由腾讯视频、创斗原创有限公司联合出品的竞技校园热血青春网络剧，由孙放执导，施柏宇、阿利亚、刘海宽、易易紫、李玉洁等联袂出演。20世纪20年代末，北方港口租界城市——上沽，繁华中充斥着伪善和真恶。