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. This makes cyber security more valuable when it is supported by hands-on practice and a clear explanation of what you built. 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.