Network Security is the protection and/or restriction of access to files and directories within a computer network against unauthorized access, system and file changes, and hacking.
Network Security is a series of protocols, software, hardware designed to restrict access to files and directories from unauthorized access while also protecting the usability and integrity of a network. This includes all data, hardware, and software as well as data inside of, and passing through, the network. Active monitoring with Network Security prevents unauthorized access while targeting and protecting against a variety of threats from entering and spreading across a network.
Network Security includes various elements for protection including application security, access control, data loss prevention, antivirus and antimalware software, intrusion prevention, firewalls, email security, and more.