What is a good beginner approach to cyber security for MCA students?

Cyber security protects applications, networks, devices and data from threats. An MCA learner can build a stronger foundation through security principles, secure coding, risk awareness and defensive practices. For an MCA learner, the best way to understand cyber security is to connect the theory with a small working example. This point is specifically relevant to the cyber security aspect of MCA study. For this specific question about cyber security, 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 cyber security for MCA students?