What courses and books to choose on computer networks and security?

Question

Information Security

I want to dive deep and continue to work in this direction. In addition to courses and books, a high-quality specialized education is also suitable. Thanks in advance for the information.

Answer 1

No courses if you want to know something.
You didn’t talk about your level, so in the classics: Olifers, CCNA leadership and Kurose with their “top-down approach”.

Answer 2

For programmers, system administrators and security people, there are many different areas that practically do not intersect with each other (for example, "cable system" and "databases"). Here you need to choose the direction of activity.
Before biting into security, you need to study the architecture of the one whose security you are going to provide. Those. you need to know the regular functioning of the system and its structure.