(In 2017, teacher Han Ligang published the book "Innovative Course on Computer Network Principles" supporting PPT. In the period, teacher Han Ligang's QQ number 458717185 and WeChat account hanligangdongqing are included. If you have problems in learning computer network principles and require software and documents for the course, you can contact teacher Han Ligang to ask for it.
Chapter 5 IP Address and Subnet Distinction.pptx)
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