Jul 29, 2022 · NS-2 can be used to implement network protocols such as TCP and UDP, traffic source behavior such as FTP, Telnet, Web, CBR, and VBR, router queues management mechanism such as Drop Tail, RED, and CBQ, routing algorithms, and many more.

In NS2 programming tutorial mainly deals two major programming paradigm i.e. C++[programming language] and also Tool Command language[TCL- Scripting language]. To be more precise, NS2 is implemented in OTCL [Object oriented extension of TCL].

This section shows a simple NS simulation script and explains what each line does. Example 3 is an OTcl script that creates the simple network configuration and runs the simulation scenario in Figure 4.

Understand how to write Tcl scripts to simulate simple network topologies and traffic patterns. Analyze the trace files and understand how to evaluate the performance of networking protocols and operations. #Run the simulation But we have no traffic! ...... "window_" is the upperbound of congestion window in a TCP. It is 20 by default.

Feb 6, 2023 · NS2 (Network Simulator version 2) is a discrete event network simulator that is widely used to simulate and analyze the behavior of computer networks. It is open-source software and is written in C++ and Otcl (Object-oriented Tool Command Language).

Feb 8, 2015 · To investigate network performance, researchers can simply use an easy-to-use scripting language to configure a network and observe results generated by NS2. Undoubtedly, NS2 has become the most widely used open source network simulator, and one of the most widely used network simulators.

Ns2 codes are defining using tcl programming languages. The network simulator is a bank of different network and protocol objects. Each of which is defined by using the languages like C++ and OTcl. Very easy to use and it is available in free. By using the OTcl we can describe different network topologies.

Learn to program using TCL: Define a Simulator: Create a simulator also using the following TCL code, Set nssim [new simulator] Define the topology: Define the size of the area in which simulation should take place; Next, we need to define the position of …

In this section, you are going to develop a Tcl script for ns which simulates a simple topology. You are going to learn how to set up nodes and links, how to send data from one node to another, how to monitor a queue and how to start nam from your simulation script to visualize your simulation.

Ns are a discrete event simulator targeted at networking research. NS-2 is built using C++ and Python with scripting capability; Main goal of ns2: To provide collaborative environment; To support network protocol design, traffic studies etc; Analyze new architecture design; For protocol comparison; Increase confidence result of network etc ...