Quick Answer: What Is Simulation Ns2?

Network Simulator (Version 2), widely known as NS2, is simply an event- driven simulation tool that has proved useful in studying the dynamic nature of communication networks.

Simulation of wired as well as wireless network functions and protocols (e.g., routing algorithms, TCP, UDP) can be done us- ing NS2.

What is meant by ns2 simulator?

NS2 is an open-source simulation tool that runs on Linux. It is a discreet event simulator targeted at networking research and provides substantial support for simulation of routing, multicast protocols and IP protocols, such as UDP, TCP, RTP and SRM over wired and wireless (local and satellite) networks.

Which language is used in ns2?

NS is licensed for use under version 2 of the GNU (General Public License) and is popularly known as NS2. It is an object-oriented, discrete event-driven simulator written in C++ and Otcl/tcl.

What is trace file in ns2?

TRACE FILES AND DESCRIPTION. The file written by an application (or by the Coverage Server) to store coverage information or overall network information and In NS2 , it is called as Trace File. In order to generate a trace file. we have to create a trace file in Otcl script.

What is CBR and FTP in ns2?

FTP is an application (and protocol) used for file transfer. It uses TCP for transport, but FTP is considered an application protocol. CBR is a quality of service term usually used in the context of codecs, describing how they convert analog signals to digital (and vice versa).

Which is better ns2 or ns3?

Ns 2 is used for wired and wireless simulation wheras ns3 is used for internet simulation. NS3 is not backward compatible with NS2; it’s built from the scratch to replace NS2.  NS3 is written in C++, Python Programming Language can be optionally used as an interface.  NS3 is trying to solve problems present in NS2.

What is DropTail ns2?

Drop Tail: It is a simple queue mechanism that is used by the routers that when packets should to be drop. In this mechanism each packet is treated identically and when queue filled to its maximum capacity the newly incoming packets are dropped until queue have sufficient space to accept incoming traffic.

What is CBR in ns2?

CBR in NS2 is one of the most important factors which scholars must know. CBR [Constant bit rate] is mainly used in networking streaming applications as content can be transferred through limited channel capacity.NS2 is one of the major simulator used today for networking applications.

What is null agent in ns2?

A “udp” agent that is attached to n1 is connected to a “null” agent attached to n3. A “null” agent just frees the packets received. A “ftp” and a “cbr” traffic generator are attached to “tcp” and “udp” agents respectively, and the “cbr” is configured to generate 1 KByte packets at the rate of 1 Mbps.

What do you mean by simulation?

A simulation is an approximate imitation of the operation of a process or system; the act of simulating first requires a model is developed. Simulation can be used to show the eventual real effects of alternative conditions and courses of action.

What is the use of NAM trace file in ns2?

Nam is a Tcl/Tk based animation tool that is used to visualize the ns simulations and real world packet trace data. The first step to use nam is to produce a nam trace file. The nam trace file should contain topology information like nodes, links, queues, node connectivity etc as well as packet trace information.

What is awk file in ns2?

AWK Script for NS2. AWK is a programming language that is designed for processing text-based data, either in files or data streams, and was created at Bell Labs in the 1970s. The name AWK is derived from the family names of its authors – Alfred Aho, Peter Weinberger and Brian Kernighan.

What is trace file?

Trace File are trace (or dump) file that Oracle Database creates to help you diagnose and resolve operating problems. Each server and background process writes to a trace file. When a process detects an internal error, it writes information about the error to its trace file.

What is NAM file in ns2?

What’s Nam

Nam is a Tcl/TK based animation tool for viewing network simulation traces and real world packet traces. It supports topology layout, packet level animation, and various data inspection tools.

What is TCL in ns2?

TCL is an interpreted language. TCL programming is used to write simulation script in ns2.

How do I run a TCL file in ns2 terminal?

How to run TCL programs

  • Open gedit. Open gedit in Ubuntu Application –> Accessories –> gedit Text editor.
  • Save file with .tcl extension. Save your file with .tcl extension.
  • Open terminal. Open your terminal in ubuntu ( Application –> Accessories –> terminal )
  • Run Following command.