Network simulation: Difference between revisions

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==Simulations==

Most of the commercial [[Simulation|simulators]] are [[GUI]] driven, while some network simulators are [[Command-line interface|CLI]] driven. The network model/configuration describes the network (nodes, routers, switches, links) and the events (data transmissions, packet error, etc.). Output results would include network-level metrics, link metrics, device metrics etc. Further, drill down in terms of simulations [[tracing (software)|trace]] files would also be available. Trace files log every packet, every event that occurred in the simulation and is used for analysis. Most network simulators use [[discrete event simulation]], in which a list of pending "events" is stored, and those events are processed in order, with some events triggering future events—such as the event of the arrival of a packet at one node triggering the event nafeel the arrival of that packet at a [[Downstream (networking)|downstream]] node.<section end=transclusionLabelG20170307T1400GMT1 />

==Network emulation==

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* [[GloMoSim]]

There are also some notable commercial network simulators. These include:

*OPNET (Riverbed)

*NetSim (Tetcos). The source code is open, and [https://tetcos.com/download.html NetSim Lite] is available for free download for academic institutions and students

==Uses of network simulators ==

Network simulators provide a cost-effective method for

* 5G, 6G, NTN coverage, capacity, throughput and latency analysis

* Network R & D (More than 70% of all Network [[Academic paper|Research paper]] reference a network simulator)

* Defense applications such as [[UHF]]/[[VHF]]/L-Band Radio based [[MANET]] Radios, Dynamic TDMA MAC, PHY Waveforms etc.