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这时，周三太爷道：哪那么容易就定了。So at the moment, We're on another machine, Use the ping command to send a message to the current machine. As shown in the following figure, the ping command can be responded to, proving that the message sent by the ping command has been normally sent to the host where the firewall is located. The IP address of the machine where the ping command is located is 146, and the IP address of the host currently testing the firewall is 156. We will use this environment to demonstrate the operation of iptables.Excellence is not a gift,一场紧张、刺激、惊险的战斗即将开始，天狼星人能否在地球少年的帮助下打败邪恶外星势力并重返天狼星？“天狼号”的超级能源成长后会有什么样炫酷的变化？板栗这才反应过来，忙问道：拴的是啥？香荽得意地摇着小脑袋，发间插的一只金钗挂下的水滴玉坠一阵乱晃，说道：是纸。Bridging mode is to separate things from their concrete implementation so that they can change independently. The purpose of bridging is: Decoupling abstraction and implementation, So that the two can be changed independently, Like our commonly used JDBC bridge DriverManager, when JDBC connects databases, it switches between databases without moving too much code or even at all. The reason is that JDBC provides a unified interface, each database provides its own implementation, and a program called database driver is used to bridge. Let's look at the diagram:　　金花带着海君回家，要海燕认了这个姐姐，她一个人带着两个女儿，等待大勇出海归来，等来的却是噩耗：海船失去联络，大勇下落不明！