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The term network operating system is used to refer to two rather different concepts: * A specialised operating system for a network device such as a router, switch or firewall. * 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.〔Dean, Tamara (2009). "Network Operating Systems", ''Network+ Guide to Networks'', 421(483)〕 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. ==Network device operating systems== Network operating systems can be embedded in a router or hardware firewall that operates the functions in the network layer (layer 3).〔Al-Shawakfa, Emad; Evens, Martha (2001). "The Dialoguer: An Interactive Bilingual Interface to a Network Operating System.", ''Expert Systems'' Vol. 18 Issue 3, p131, 19p, Retrieved 5/7/2011.〕 *Examples: * * JUNOS, used in routers and switches from Juniper Networks, * * Cisco IOS (formerly "Cisco Internetwork Operating System"). * * TiMOS, used in routers from Alcatel-Lucent * * VRP (Versatile Routing Platform), used in routers from Huawei * * RouterOS, software which turns a PC or MikroTik hardware into a dedicated router * * ZyNOS, used in network devices made by ZyXEL. * * Extensible Operating System used in switches from Arista * * ExtremeXOS, used in network devices made by Extreme Networks. Also called EXOS. * * Embedded Linux, in distributions like Openwrt and DD-WRT which run on low-cost platforms such as the Linksys WRT54G. *Open Source Network operating system examples: * * Cumulus Linux distribution, which uses the full TCP/IP stack of Linux. * * Dell Networking Operating System (DNOS)is the new name for the operating system running on switches from Dell Networking. This will run on top of NetBSD * * Open Network Operating System (ONOS) * * PicOS, Linux-based OpenFlow-supporting switching operating system from produced by Pica8. * * VyOS, an open source fork of the Vyatta routing package * * OpenSwitch Linux Network Operating System from Hewlett-Packard.〔(Launches OpenSwitch Linux Network Operating System http://www.enterprisenetworkingplanet.com/netos/hp-launches-openswitch-linux-network-operating-system.html?utm_medium=email&utm_campaign=ENP_NL_ND_20151007_STR1L1&dni=278910534&rni=8075818 )〕 ==Historical network operating systems== Early microcomputer operating systems such as CP/M, MS-DOS and Mac OS were designed around a single user on a single computer. As local area network technology became available, two general approaches to handle sharing arose. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Network operating system」の詳細全文を読む スポンサード リンク
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