What is a good beginner approach to computer networks for MCA students?

Computer networks explain how devices and systems communicate. Topics such as TCP/IP, routing, switching, DNS and network layers give MCA students a foundation for software and infrastructure roles. Students can judge their progress in computer networks by solving problems independently instead of depending entirely on guided tutorials. This point is specifically relevant to the computer networks aspect of MCA study. For this specific question about computer networks, the practical takeaway is to relate the concept to your own MCA learning goal. In other words, this guidance addresses: What is a good beginner approach to computer networks for MCA students?