<Li> An operating system oriented to computer networking, to allow shared file and printer access among multiple computers in a network, to enable the sharing of data, users, groups, security, applications, and other networking functions, typically over a local area network (LAN), or private network . This sense is now largely historical, as common operating systems generally now have such features included . </Li> <P> Network operating systems can be embedded in a router or hardware firewall that operates the functions in the network layer (layer 3). </P> <Ul> <Li> Examples: <Ul> <Li> JUNOS, used in routers and switches from Juniper Networks </Li> <Li> Cisco Internetwork Operating System (IOS) </Li> <Li> IPOS, used in routers from Ericsson </Li> <Li> FortiOS, used in Fortigates from Fortinet </Li> <Li> TiMOS, used in routers from Alcatel - Lucent </Li> <Li> Versatile Routing Platform (VRP), used in routers from Huawei </Li> <Li> RouterOS, software which turns a PC or MikroTik hardware into a dedicated router </Li> <Li> ZyNOS, used in network devices made by ZyXEL . </Li> <Li> Extensible Operating System used in switches from Arista </Li> <Li> ExtremeXOS (EXOS), used in network devices made by Extreme Networks </Li> <Li> Embedded Linux, in distributions like Openwrt and DD - WRT which run on low - cost platforms such as the Linksys WRT54G </Li> </Ul> </Li> <Li> Open source network operating system examples: <Ul> <Li> Cumulus Linux distribution, which uses the full TCP / IP stack of Linux . </Li> <Li> Dell Networking Operating System (DNOS) is the new name for the operating system running on switches from Dell Networking; it will run atop NetBSD </Li> <Li> Open Network Operating System (ONOS) </Li> <Li> PicOS, Linux - based OpenFlow - supporting switching operating system from made by Pica8 </Li> <Li> VyOS, an open source fork of the Vyatta routing package </Li> <Li> OpenSwitch Linux Network Operating System from Hewlett - Packard . </Li> </Ul> </Li> </Ul> <Li> Examples: <Ul> <Li> JUNOS, used in routers and switches from Juniper Networks </Li> <Li> Cisco Internetwork Operating System (IOS) </Li> <Li> IPOS, used in routers from Ericsson </Li> <Li> FortiOS, used in Fortigates from Fortinet </Li> <Li> TiMOS, used in routers from Alcatel - Lucent </Li> <Li> Versatile Routing Platform (VRP), used in routers from Huawei </Li> <Li> RouterOS, software which turns a PC or MikroTik hardware into a dedicated router </Li> <Li> ZyNOS, used in network devices made by ZyXEL . </Li> <Li> Extensible Operating System used in switches from Arista </Li> <Li> ExtremeXOS (EXOS), used in network devices made by Extreme Networks </Li> <Li> Embedded Linux, in distributions like Openwrt and DD - WRT which run on low - cost platforms such as the Linksys WRT54G </Li> </Ul> </Li>

What is the role of network operating system