(Designed to lower the entry barrier for network defense hackers, it is suitable for all small and medium-sized enterprises and traditional enterprises. List common attack methods and defense methods, so that website administrators have basic protection capabilities. The simple implementation of Python programming makes network operation and maintenance easier. Analyze the theories and principles of various hacking tools, let people know what they are, and know their defenses. Involving the Internet and LAN, it makes enterprise-level network management easier. Covers the knowledge points of Linux&Windows.)