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我张家的大小姐就是不一样，真是好啊。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:If you fry, use a striped cast iron pan. When the fire is at its maximum, it is better to smoke. As long as the meat is good enough, the oil does not need to be put in, and the beef will fry out the oil itself. When each side is fried for 40S and 20S, it rotates 90 degrees, which will have the stripes shown in the above figure. This time the meat is thicker, so I also fried the two thick sides for 30S respectively. If it is thinner, it is good to fry for 15S and seal the juice.A friend taught me a method that impressed me deeply. A cloud service provider promised that each host would protect attacks below 5G traffic, and they bought five at one go. The website is set up on one of the hosts, but it is not exposed to the users. The other hosts are mirrored and are used to face the users. DNS will evenly distribute the traffic to the four mirror servers. Once there is an attack, this architecture can prevent 20G of traffic. If there is a bigger attack, then buy more temporary hosts and continuously expand the image.Http://www.freebuf.com/news/67204.html如何能比得上陈先生？对任何人都了若指掌。