Network security course

Applications Cybersecurity
1

Hi

I was wondering if someone could give some tips about network security postgraduate courses and/or certifications .

I know that is a generic question and a wide area, but that's the problem, the net is full of books, courses, or whatever.
My goal is to find a good course (or book) that face the network security issue, I'd like just get a feedback from someone. :slight_smile:

Thanks a lot