1, network security theory
2, network security text (vernacular convince others)
https://www.cnblogs.com/andy9468/p/10944415.html
3, network security tools
https://www.cnblogs.com/andy9468/p/10656517.html
https://www.cnblogs.com/andy9468/p/10719068.html
4, network security open source tools
5, Network Security Case
6, network security reference