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Contents. History NetSim is a stochastic discrete event simulator developed by the Indian company TETCOS, in association with, with the first release in June 2004.

Model libraries in NetSim Modeling and simulation are supported for the below mentioned technologies. Protocol libraries are available with C source code. Inter-Networks: - Fast & Gigabit, - IEEE 802.11 a/ b / g / n / ac and e. Propagation models - Free space, Log-normal, Rayleigh Fading.

Routing - RIP, OSPF. Queuing - Round Robin, FIFO, Priority - Tahoe, Reno, New Reno, BIC and CUBIC,. Common Modules with Internetworks: Applications (Traffic Generator): Voice, Video, FTP, Database, HTTP, Email, Peer-to-peer and Custom. Encryption: AES, DES.

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Virtual Network Stack, Simulation Kernel, Command Line Interface, Wireshark Interface, Metrics Engine with Packet Trace and Event Trace, Packet Animator. Legacy Networks -, Slotted Aloha, Token Bus,. Advanced Routing - BGP, IGMP, PIM, VLAN, NAT, Multicast applications, Multicast emulation. Advanced Wireless Networks -, covering DSR, AODV, ZRP, OLSR etc. With sinkhole / black hole attacks and intrusion detection.

Cellular Networks - and. Sensor Networks - with LEACH etc.,. (IOT) with Routing Protocol for Low Power and Loss Networks (RPL).

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Networks. Networks, Networks - SU / MU with Carrier aggregation and Relays, LTE D2D, LTE Femto Cell.

with interfacing to SUMO through TraCI API's. Military Radios - Tactical and Airborne radios in HF, VHF, UHF bands with crypto and frequency hopping. Tactical data links, TDMA, Dynamic TDMA In addition modules are available for sink hole attack, intrusion detection, packet encryption, packet capture using etc. NetSim Emulator The Network Emulator Add on allows users to link NetSim to live applications running on real devices. This allows for real traffic to flow via the emulator and experience network effects. In this virtual network, numerous test scenarios, involving real devices and application, can be constructed and executed repetitively for normal operation as well as perturbed operation. Impairment scenarios can studied which included escalating latency, bandwidth constriction at various points, jitter tolerance, packet loss, packet reordering, route loss, failovers and single point of failure identification.

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Emulator module from NetSim v10.1 allows users to interface devices such as Raspberry PI, Arduino etc to NetSim. External Interfacing NetSim can interface externally with, and SUMO for VANETs. NetSim can also interface with live PC's / Sensors using the emulation add-on module Academic Version A deeply discounted academic version is available to universities for teaching and network lab experimentation. No student version is available as of date.

Applications NetSim is widely used for:. Network R & D including custom protocol development. Network lab experimentation in universities. Defense applications.

Railway communication networks. Utilities transmission and distribution - SCADA Communication Networks.

Water/Waste Water, Electric Grid and Oil & Gas. Wireless / Satellite link emulation.

Experimentation on Application of Machine Learning to networks Custom code development NetSim comes with an in-built development environment, which serves as the interface between User’s code and NetSim's protocol libraries and simulation kernel. Protocol libraries are available as open C code for user modification. De-bugging custom code during simulation is an advanced feature: i.e. A simulation can be started and then at user determined breakpoints in the code, users can perform single-step, step-in, step over etc. This can be carried out at various levels (depending on where the user code links) including at a per-packet interval.

Customers Over 300 customers across 15 countries use NetSim, including premier enterprises like, etc. And several defense agencies like labs and space agencies like use NetSim for modeling the unique requirements of space, defense R & D and. Hundreds of academic institutions such as - Bangladesh, - Germany, Leeds University, Univ of Wales - UK, - Malaysia, - US, - India, North West University - South Africa, Dar Al Hekma, Taif University - Saudi Arabia etc also use NetSim for teaching / lab experimentation and for network R & D. Eventually Department of Electronics and Communication Engineering (ECE) of KUET is the first department in Bangladesh to use NetSim. See also. References.