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NS3 network simulator:

NS3 network simulator is a discrete event simulator that used to simulate internet systems. It is mainly developed to focus research and educational purpose. The main aim of NS3 network simulator is to develop a environment for simulation to network.

NS3 Simulation:

The ns3 simulation helps to simulate realistic models which in turn it can be used as a emulators.NS3 supports both IP and Non-IP based simulations.

Ns3 network Simulator Features:

The network simulator 3 has the following features

1.Scalabilty

2. No memory waste in IPv4 for node creation.

3.Mobility of the node may or may not be defined.

4.Cross layer features are available

5.More flexible

Ns3 Simulator Example:

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Helper Object:

With the help of the point to point helper object we can create the network topology. with the help of this object we can set the data rate and the transmission delay of the channel.

PointToPointHelper pointToPoint;

pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("10Mbps"));

pointToPoint.SetChannelAttribute ("Delay", StringValue ("4ms"));

Once after the topology is designed we need to design device container, Ipv4 address for each node , Simulation start and ending time of the network.

To write a simple ns3 code :

Header Files:

The code starts with the following header files

All the ns3 library files are present in a folder called ns3 so during run time in order to avoid name collision all the header files included are written along with the root directory path as

"#include ns3/coree-module.h".

Logging:

To find the logging details of ns3 details of ns3 NS_LOG_COMPONENT_DEFINE module is used. The general syntax for the

NS_LOG_COMPONENT_DEFINE ("example");

example is the logging component that helps us to disable or enable message logging by taking that name as a reference.

Main function:

int main(int argc,char *argv[]) represents the starting of the main function.

Creating Nodes:

Node container class is used to create nodes.The syntax to create node is given by

NodeContainer nodes;

nodes.create(20);

We provide full support along with our team of experts in NS3 network simulator and helps research scholars and UG/PG students to do their ns3 network simulator projects , journal publications , research and much more.

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