Definition: The phrase, "computer network", refers to one or more computers or terminals that are connected to one another. Such an infrastructure makes it possible for employees to share information resources and to use expensive equipment in a more cost effective manner. A modern electronic information system capable of connecting individuals and devices was made possible by telecommunication protocols (rules) that are part of the Internet (TCP/IP). Nearly all operating system publishers (Windows and iOS) have created computer network software based upon TCP/IP (Transmission Control Protocol/Internet Protocol). Network owners and operators face increased challenges related to information assurance.
Its Relevance: Sharing information resources (documents, printers, an intranet, etc.) can be a major boost to an organization's productivity. An information system that links computers and workstations, however, can give rise to special security challenges and gives rise to major security vulnerabilities.
Proper authentication of users is but one example. Protecting the system against unauthorized intrusions is a necessity. Computer security and internet security, relative to computer networks, become a necessity.