Network servers control and manage network resources such as files, printers, users, groups, etc.

Network firewalls are systems that enforce access control policy between an organization's network and the Internet for security purposes.

Network equipment is used to split, switch, boost, or direct packets of information along a network.

Communications and network software is used for the setup and management of digital communication networks such as LAN and WAN computer networks, electronic mail, FAX, audio and video networks, wireless communication systems, etc.