H3C SE-Security（防火墙）课程
H3CSE-Security防火墙方面的系列PPT文档，搞安全就得好好学习哦！第一章防火墙技术介绍.ppt
包括多个文件，请自行下载检测！
(A series of PPT documents on H3CSE-Security firewall, you have to study hard for security!
Chapter 1 Introduction to Firewall Technology.ppt
Including multiple files, please download and test by yourself!)
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