Network security consists of the policies and practices adopted to prevent and monitor unauthorized access, misuse, modification, or denial of a computer network and network-accessible resources. Network security involves the authorization of access to data in a network, which is controlled by the network administrator. Users choose or are assigned an ID and password or other authenticating information that allows them access to information and programs within their authority. Network security is involved in organizations, enterprises, and other types of institutions. It secures the network, as well as protects and oversees operations being done.
Nowadays businesses have access to more valuable information than ever before—and protecting that information is vital to business success. Effective network security acts as a gatekeeper to that information, preventing unauthorized access, misuse, modification, or alteration of a computer network and its resources. Network security is any system, device, or action designed to protect the safety and reliability of a network and its data. It manages access to a network by stopping a variety of threats from entering and spreading through a system.