As the Chief Information Security Officer (CISO) at a large university, you are responsible for the security of a campus-wide Wi-Fi network that serves thousands of students, faculty, and staff. Recen

As the Chief Information Security Officer (CISO) at a large university, you are responsible for the security of a campus-wide Wi-Fi network that serves thousands of students, faculty, and staff. Recently, there has been a rise in reports of unauthorized network access, and you suspect that some users are sharing their login credentials. You are considering deploying an additional layer of security that could effectively mitigate this issue. What would be the most suitable measure to implement in this context?