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In computer network research, network simulation is a technique whereby a software program replicates the behavior of a real network. This is achieved by calculating the interactions between the different network entities such as routers, switches, nodes, access points, links, etc. [1] Most simulators use discrete event simulation in which the modeling of systems in which state variables ...
ns (from network simulator) is a name for a series of discrete event network simulators, specifically ns-1, ns-2, and ns-3. All are discrete-event computer network simulators, primarily used in research [ 3 ] and teaching.
Graphical Network Simulator-3 (shortened to GNS3) is a network software emulator first released in 2008. [ 2 ] [ 3 ] [ 4 ] It allows the combination of virtual and real devices, used to simulate complex networks.
Packet Tracer is a cross-platform visual simulation tool designed by Cisco Systems that allows users to create network topologies and imitate modern computer networks.The software allows users to simulate the configuration of Cisco routers and switches using a simulated command line interface.
The selection of simulation as a modelling tool is usually because it is less restrictive. Other modelling techniques may impose material mathematical restrictions on the process, and also require multiple intrinsic assumptions to be made. [2] Network traffic simulation usually follows the following four steps: [1] [2]
OMNeT++ itself is a simulation framework without models for network protocols like IP or HTTP. The main computer network simulation models are available in several external frameworks. The most commonly used one is INET [8] [9] which offers a variety of models for all kind of network protocols and technologies like for IPv6, BGP.
samadii - Computer-aided-engineering-based simulation software designed to run simulations such as solid particles, high vacuum systems gas-flow environments, plasma, and electromagnetic simulations. Ship Simulator - a vehicle simulation computer game by VSTEP which simulates maneuvering various ships in different environments.
Discrete event simulation is used in computer network to simulate new protocols, different system architectures (distributed, hierarchical, centralised, P2P) before actual deployment. It is possible to define different evaluation metrics, such as service time, bandwidth, dropped packets, resource consumption, and so on.