Ns2 architecture

Network Simulator Version 2, widely known as NS2, is an event driven simulation tool that is useful in studying the dynamic nature of communication networks. Simulation of wired as well as wireless network functions and protocols e.

In general, NS2 provides users with a way of specifying such network protocols and simulating their corresponding behaviors. Due to its flexibility and modular nature, NS2 has gained constant popularity in the networking research community since its birth in Ever since, several revolutions and revisions have marked the growing maturity of the tool, thanks to substantial contributions from the players in the field.

Last but not the least, the group of researchers and developers in the community are constantly working to keep NS2 strong and versatile. Figure given below shows the basic architecture of NS2. NS2 provides users with an executable command ns which takes on input argument, the name of a Tcl simulation scripting file. Users are feeding the name of a Tcl simulation script which sets up a simulation as an input argument of an NS2 executable command ns. Conceptually, a handle e.

Instead, the functionality e. In the OTcl domain, a handle acts as a front end which interacts with users and other OTcl objects. It may defines its own procedures and variables to facilitate the interaction. Note that the member procedures and variables in the OTcl domain are called instance procedures instprocs and instance variables instvarsrespectively. However, advance users may find these objects insufficient.

After simulation, NS2 outputs either text-based or animation-based simulation results. To analyze a particular behavior of the network, users can extract a relevant subset of text-based data and transform it to a more conceivable presentation. NS2 is a free simulation tool. Being developed in the Unix environment, with no surprise, NS2 has the smoothest ride there, and so does its installation.

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NS2 source codes are distributed in two forms: all-in-one suite and the component-wise. With the all-in-one package, users get all the required components along with some optional components. This is basically a recommended choice for the beginners.You seem to have CSS turned off. Please don't fill out this field. Ns is a discrete event simulator targeted at networking research. Ns provides substantial support for simulation of TCP, routing, and multicast protocols over wired and wireless local and satellite networks.

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ns2 architecture

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ns2 architecture

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Network Simulator 2 (NS2) : Features & Basic Architecture Of NS2

Company Size Company Size: 1 - 25 26 - 99 - - 1, - 4, 5, - 9, 10, - 19, 20, or More. Get notifications on updates for this project. Get the SourceForge newsletter. JavaScript is required for this form. No, thanks. Project Activity. License Apache License V2. Follow nsnam nsnam Web Site. Etcher is a powerful OS image flasher. It protects a user from accidentally overwriting hard-drives by making drive selection obvious; and with validated flashing there is no more writing images to corrupted drives.

It is also called balenaEtcher since it is developed by balena. In addition, Etcher can flash directly Raspberry Pi devices that support usbboot. Use for. Learn More.NS2 Projects Documentation is one of our major services, started with a Nobel goal to serve the budding students and scholars with our efforts and also expertise. We provide NS-2 documentation for students[B.

Network on Chip 3d using NS2 Simulation - NS2 Projects Code

The most important part of any project is its documentation as it speaks about what you have done actually. Two most important aspect of any documentation is also the technical and also language expertise, we have equipped in that document. We also have well trained developers and native English writers, who impart their complete efficiency and skills into your documentation to make it a scientific note. Our language experts rewrite the complete documentation also to make it communication wise proficient.

This is also the reason majority of scholars opt us for documentation help along with their projects. Below we also have mentioned our standard documentation format, which can also customized according to your university format. You can also have glance over the few below mentioned recent topics in NS-2, to get an idea about NS2 projects.

Now, you may also now get an idea about your NS2 project documentation format. Our documentation format is not static; we also will support you as per your university format.

This service starts from topic selection and ends with your report submission.

ns2 architecture

In short, we also offer all round support for your project. For further guidance and also tutoring service on NS2 projects, approach our experts through our online service. Our experts also will mine best and also innovative ideas for your project.

We offer complete documentation support along with code support for the below mentioned topic or any topic, you wish to work on.NS2 NAM Projectsan innovative solution started with the collaboration of top researchers and connoisseurs with an only focus to serve the budding researchers and scholars.

As our concern has started with the efforts of top experts and professionals, today we serve as a knowledge hub for millions of students worldwide. Students approach us for innovative and newfangled ideas for their projects and research work. We provide our complete guidance with the help of our experts and versatile developers to enhance the academic grades of students.

If you feel to work with us, why to wait and think, approach us today. NS2 NAM Projects is one of our dedicated services started with an initiative of top experts and technocrats from all over the world. It includes various control options like Play, stop, rewind, fast forward, pause, packet monitor facility and speed control display. It is generally executed using TCL Script.

You may think that why we have focused one complete article on NAM. It is simple to say that NAM is one of the most important tools of NS2 without which graphical Interface is not possible. We have provided just few basic information about NAM in this article, to know completely, about it refer our other articles or simply approach us through our online tutoring service.NS2 is a most prominent tool to develop network, protocol and topology.

We ensure NS2 as discrete event based simulator and have capacity to extend and modify. We offer Ns2 projects in Pune for college students and research scholars under networking domain around pune. We support NS2 simulation to design new routing protocol with multicast function. We implement code in NS2 for network ensures more application developed in wireless network. We can provide compassion of single and multi routing protocol separately.

In wireless network topology modification ensure change in node includes Run out of power, fail or join Network.

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To ensure guarantee delivery in Network we use location free Greedy face greedy routing protocol which taken from the reference of Springer Papers. To create virtual network in unique network plane we have LFGFG with multivalued, multiple virtual nodes and multiple virtual links. To enhance efficiency we implement an important and effective way called internet service provider and peering.

We use internet peering which reduce cost and reliance on purchased internet transit.

ns2 architecture

ISP is used to reduce telecommunication. We create optical packet network by various equipped switches with set of limited range wavelength converters. We use optional packet network scheduling algorithm to increase switch throughput.

We provide M. Tech projects to overcome scheduling problem. We implement MBM with minimum edge to eradicate scheduling problem formation. We implement this algorithm by NS2 simulation. We use various services model to evaluate best effort internet with QoS and packet level differentiation. We ensure end to service differentiation by per hop behavior basis. We adopt edge router in each domain to aggregate incoming packet flow and demote packet with inter domain service agreement.

We permit random early demotion and promotion as:. We gave marking scheme as one color to differentiate demoted packet and packet with original out of profile.Simulation is the process of learning by doing. Whenever there is something new in the world, we try to analyse it first by examining it and in the process get to learn a lot of things. This entire course is called as Simulation. Correlating to this process, in order to understand all the complexities one need to model the entire role-play in form of computer simulation, the need is to build artificial objects and assign them roles dynamically.

ns (simulator)

Computer simulation is the designing of a theoretical physical system on a digital computer with emphasis on model designing, execution and analysis. After creation of the mathematical model the most important step is to create a computer program for updating the state and event variables through time by time slicing or event scheduling.

If this simulation is carried out successively in parallel computers, it is called Parallel or Distributed simulation. It provides simulation for routing and multicast protocols for both wired and wireless networks. Install NS-2 using this command :. Nam is also needed to install. Nam Network Animator is an animation tool to graphically represent the network and packet traces. Use this command :. Explanation : In the first line, the variable a is assigned the value 8.

Below is the implementation of creating links between the source and destination using both ftp and tcp :.

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Output :. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute. See your article appearing on the GeeksforGeeks main page and help other Geeks. Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below. Writing code in comment? Please use ide. Create a simulator object.

Define different colors. Define a 'finish' procedure. Close the NAM trace file. Execute NAM on the trace file. Create links between the nodes. Set Queue Size of link n2-n3 to Give node position for NAM. Monitor the queue for link n2-n3. Call the finish procedure after. Print CBR packet size and interval.

Chinmoy Kalita. Check out this Author's contributed articles. Load Comments.Initially, the project aimed to find and prototype the necessary technology to prove the feasibility of an internet server that had the guaranteed availability, response time and scalability using Linux and open-source software. The project was successful, and it continued in to focus on enhancing the clustering capabilities of Linux to be the operating system of choice for the Mobile Internet servers.

Many enhancements were added in the areas of load balancing, traffic distribution and security, in addition to IPv6 support. One interesting question that came up was what is the impact of supporting IPv6 on other protocols used by different applications on our Linux clusters? To answer this question, we started a study investigating the effects of IPv6 support on other protocols, such as SCTP.

However, we did not have the time and resources to set up a lab with multiple nodes and applications that use SCTP over IPv6. Instead, we chose the next best solution, network simulation. There is a growing recognition within different internet communities of the importance of simulation tools that help design and test new internet protocols.

New services and protocols present challenges for testing. For instance, quality of service and multicast delivery require large and complex environments. Protocol designers recognize the advantages of simulation when computing resources are not available or are too expensive to duplicate a real lab setup.

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With simulation, you can do large-scale tests that are controlled and reproducible. This was exactly what we needed to build our case scenarios; the search started primarily for an open-source tool because most of our work targets the deployment of open-source software based on Linux.

Our target application is a real-time network simulation tool that we can use to define the different scenarios. In this article, we summarize how to install and configure NS2 and look at two different simulation scenarios.

The first scenario involves monitoring SCTP traffic between two nodes, and the second scenario looks at the behavior of web traffic and web applications over TCP over a six-node network. NS2 is an open-source simulation tool that runs on Linux. It has many advantages that make it a useful tool, such as support for multiple protocols and the capability of graphically detailing network traffic.

Additionally, NS2 supports several algorithms in routing and queuing. LAN routing and broadcasts are part of routing algorithms. Queuing algorithms include fair queuing, deficit round-robin and FIFO. REAL is a network simulator originally intended for studying the dynamic behavior of flow and congestion control schemes in packet-switched data networks. NS2 also builds and runs under Windows. Simple scenarios should run on any reasonable machine; however, very large scenarios benefit from large amounts of memory.

Additionally, NS2 requires the following packages to run: Tcl release 8. The process of installing NS2 is straightforward yet lengthy.

At the time of writing, the most recent version was 2. We are interested in the "all-in-one" package because it includes the source code that we want to patch in SCTP support. The patch is available for the NS2 all-in-one 2.

In the same directory, there is a script named install that will configure, compile and install the required and optional NS2 components. There is no interaction with the user while installing; the script is completely automated. You must execute the script as superuser so that installation of binaries will be completed:. Carefully follow all instructions given in the notices.

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