This book is really amazing, covers basics of 3/4/5G networking as well. I would say this book is mandatory reading for all engineers who deal with networking.

This book is really amazing, covers basics of 3/4/5G networking as well. I would say this book is mandatory reading for all engineers who deal with networking. It also covers enough in HTTP that you can get by without reading the entire spec. If I were designing a course I would put the book near the beginning.