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. A good MCA study plan should leave time for both the theory behind cyber security and regular implementation practice. 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.