Network operating system (NOS)

An NOS is software that, alongside the execution of common computer programs, enables the provision of network services too. The most common network services are file and print sharing; however, today's NOSs are noticeably more advanced. Thus, NOS enables you to configure network services such as directory services, web server, mail server, database server, proxy server, DHCP server, remote access server, and many more. Just as the services provided by NOS are varied, the NOS itself is different too. So, the most popular NOSs today are Windows Server, Linux Server, and macOS X server.