Network operating system

Short description: Computer software for running local area networks

A network operating system (NOS) is a specialized operating system for a network device such as a router, switch or firewall.

Historically operating systems with networking capabilities were described as network operating systems, because they allowed personal computers (PCs) to participate in computer networks and shared file and printer access within a local area network (LAN). This description of operating systems is now largely historical, as common operating systems include a network stack to support a client–server model.

## Contents

* 1 Key functions
* 2 History
* 3 Network device operating systems
* 3.1 Proprietary network operating systems
* 3.2 FreeBSD, NetBSD, OpenBSD, and Linux-based operating systems
* 4 See also
* 5 References

## Key functions

Network operating systems (NOS) are responsible for managing various network activities. Key functions include creating and managing user accounts, controlling access to resources such as files and printers, and facilitating communication between devices. Network operating systems also monitor network performance, addresses issues, and manages resources to ensure efficient and secure operation of the network.[1]

## History

Packet switching networks were developed to share hardware resources, such as a mainframe computer, a printer or a large and expensive hard disk.[2]: 318

Historically, a network operating system was an operating system for a computer which implemented network capabilities. Operating systems with a network stack allowed personal computers to participate in a client-server architecture in which a server enables multiple clients to share resources, such as printers.[3][4][5]

These limited client/server networks were gradually replaced by peer-to-peer networks, which used networking capabilities to share resources and files located on a variety of computers of all sizes. A peer-to-peer network sets all connected computers equal; they all share the same abilities to use resources available on the network.[4]

Today, distributed computing and groupware applications have become the norm. Computer operating systems include a networking stack as a matter of course.[2]: 318 During the 1980s the need to integrate dissimilar computers with network capabilities grew and the number of networked devices grew rapidly. Partly because it allowed for multi-vendor interoperability, and could route packets globally rather than being restricted to a single building, the Internet protocol suite became almost universally adopted in network architectures. Thereafter, computer operating systems and the firmware of network devices tended to support Internet protocols.[2]: 305

## 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).[6] Notable network operating systems include:

### Proprietary network operating systems

* Cisco IOS, a family of network operating systems used on Cisco Systems routers and network switches. (Earlier switches ran the Catalyst operating system, or CatOS)
* RouterOS by MikroTik
* ZyNOS, used in network devices made by ZyXEL

### FreeBSD, NetBSD, OpenBSD, and Linux-based operating systems

* Cisco NX-OS, IOS XE, and IOS XR; families of network operating systems used across various Cisco Systems device including the Cisco Nexus and Cisco ASR platforms
* Junos OS; a network operating system that runs on Juniper Networks platforms
* Cumulus Linux distribution, which uses the full TCP/IP stack of Linux
* DD-WRT, a Linux kernel-based firmware for wireless routers and access points as well as low-cost networking device platforms such as the Linksys WRT54G
* Dell Networking Operating System; DNOS9 is NetBSD based, while OS10 uses the Linux kernel
* Extensible Operating System runs on switches from Arista and uses an unmodified Linux kernel
* ExtremeXOS (EXOS), used in network devices made by Extreme Networks
* FTOS (Force10 Operating System), the firmware family used on Force10 Ethernet switches
* IPFire, an open source firewall distribution
* ONOS, an open source SDN operating system (hosted by Linux Foundation) for communications service providers that is designed for scalability, high performance and high availability.
* OpenBSD, an open source operating system which includes its own implementations of BGP, RPKI, OSPF, MPLS, VXLAN, and other IETF standardized networking protocols, as well as firewall (PF) and load-balancing functionality.
* OpenWrt used to route IP packets on embedded devices
* pfSense, a fork of M0n0wall, which uses PF
* OPNsense, a fork of pfSense
* SONiC, a Linux-based network operating system developed by Microsoft
* VyOS, an open source fork of the Vyatta routing package

## See also

* Distributed operating system
* FRRouting
* Interruptible operating system
* Network Computer Operating System
* Network functions virtualization
* Operating System Projects
* SONiC (operating system)

## References

1. ↑ "What is a Network Operating System?". https://www.geeksforgeeks.org/what-is-a-network-operating-system/. Retrieved 2025-02-11.
2. ↑ 2.0 2.1 2.2 McHoes, Ann; Flynn, Ida M. (2012). Understanding Operating Systems (6 ed.). CEngage Learning. ISBN 9781133417569.
3. ↑ Dean, Tamara (2009). "Network Operating Systems". Network+ Guide to Networks. pp. 421, 483. ISBN 9781337569330.
4. ↑ 4.0 4.1 Winkelman, Roy (2009). "An Educator's Guide to School Networks". Florida Center for Instructional Technology, University of South Florida. 6: Software. http://fcit.usf.edu/network/chap6/chap6.htm.
5. ↑ "Network Operating System". PC Magazine (Ziff Davis). 2011.
6. ↑ Al-Shawakfa, Emad; Evens, Martha (2001). "The Dialoguer: An Interactive Bilingual Interface to a Network Operating System". Expert Systems 18 (3): 131.

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