Networks linking desktop computers allow users to send electronic mail (e-mail) and to share data, computer applications, and Internet connections. Networking is what makes individual workstations communicate, and these systems can be fairly complex. As more institutions establish computer networks, the demand for skilled computer network technicians will grow. The expansion of mobile technologies also means that more organizations are likely to use the Internet to conduct business online. This growth translates into a need for network system technicians who can help organizations use the technology to communicate with staff, consumers and clients.

Computer network technicians build and maintain computer networks used by organizations. They often build network such as LANs, WANs, intranets and other data communication systems. They are responsible in providing support service to employees and clients with regards to the application of the new system and creating and maintaining passwords and files. They are also responsible to maintain software update, backup files and do network system security inspections.