Information and Network Security - Manmohan Singh - Bog

cybersecurity is a subset of information security that deals with protecting an organization's internet-connected systems from potential cyberattacks; and network security is a subset of cybersecurity that is focused on protecting an organization's IT infrastructure from online threats.
Network security consists of the policies, processes and practices adopted to prevent, detect and monitor unauthorized access, misuse, modification, or denial of a computer network and network-accessible.