How to Start HTTP HTTPS Projects Using NS2

To create a HTTP/HTTPS projects using NS2 (Network Simulator 2), we can replicate the application-level traffic that mimics HTTP or HTTPS communication among the clients and servers. Although NS2 don’t have built-in direct helps for HTTPS such as which involves encryption, we can replicate the HTTPS through adding delays and alter the packet parameters to reproduce the overhead of encode.

Steps to Start HTTP/HTTPS Projects Using NS2

  1. Understand the Basics of HTTP/HTTPS in NS2
  • HTTP/HTTPS in NS2:
    • The HTTP (HyperText Transfer Protocol) can be replicated the Application/Traffic/HTTP in NS2.
    • HTTPS (HTTP over SSL/TLS) can be approached through adding latency and processing overhead to replicate the encode.
  • Why Use NS2 for HTTP/HTTPS Simulations?
    • Study the web congestion design in a network.
    • Analysis the performance effect for HTTP vs. HTTPS.
    • Estimate the throughput, latency, and the effect of encode.
  1. Install NS2
  • Install NS2 on your system:

sudo apt-get update

sudo apt-get install ns2

  • Validate the installation through processing:

bash

Copy code

ns

If % appears, the installation is successful.

  1. Define Your HTTP/HTTPS Project Goals
  • In general project aim includes are:
    • Replicating the client-server communication over HTTP or HTTPS.
    • Estimate the performance effect for HTTPS encode.
    • Study the congestion design below the high load or congestion.
    • It associates the HTTP/1.1, HTTP/2, or HTTPS overhead.
  1. Plan the Network Topology
  • Basic Topology:
    • The clients connect the server through routers and connection.
  • Scenarios:
    • It has a Single client-server communication.
    • The several clients assign the web server such as mimicking real-world web traffic.
    • Congested network by various HTTP/HTTPS sessions.
  1. Create a Basic HTTP Simulation

Here is a basic HTTP simulation script in NS2:

Example Script:

# Create Simulator Object

set ns [new Simulator]

# Trace and NAM Files

set tracefile [open http.tr w]

$ns trace-all $tracefile

set namfile [open http.nam w]

$ns namtrace-all $namfile

# Create Nodes

set client [$ns node]

set router [$ns node]

set server [$ns node]

# Create Links

$ns duplex-link $client $router 10Mb 10ms DropTail

$ns duplex-link $router $server 10Mb 20ms DropTail

# HTTP Traffic

set tcp [new Agent/TCP]

$ns attach-agent $client $tcp

set sink [new Agent/TCPSink]

$ns attach-agent $server $sink

# HTTP Application

set http [new Application/Traffic/HTTP]

$http attach-agent $tcp

$http set size_ 512  ;# Set request size in bytes

$http set interval_ 0.1 ;# Set inter-request interval in seconds

# Start Simulation

$ns at 1.0 “$http start”

# End Simulation

proc finish {} {

global ns tracefile namfile

$ns flush-trace

close $tracefile

close $namfile

exec nam http.nam &

exit 0

}

$ns at 10.0 “finish”

# Run Simulation

$ns run

  1. Simulate HTTPS
  • HTTPS has includes encode and decode for the overhead. We can replicate this by:
    • Increase the latency to replicate the processing delays:

$http set interval_ 0.2  ;# Increased interval for encryption delay

    • Decrease the connection bandwidth to account for encodes the overhead.
  • HTTPS Traffic Simulation Build a modify application and we increase the processing delays in C++. Alter the NS2 key to replicate the encode processing at the server and client.
  1. Analyze the Results
  • Trace File Analysis:
    • Use the .tr file to measure:
      • Packet loss and retransmissions
      • Packet delivery.
      • Response time.
    • Sample:

grep “tcp” http.tr > analysis.txt

  • Visualize with NAM: Start the .nam file to view the simulation:

nam http.nam

  1. Enhance the HTTP/HTTPS Simulation
  • Add More Clients: Replicate the several clients assign the server.

set client2 [$ns node]

$ns duplex-link $client2 $router 10Mb 10ms DropTail

  • Vary Request Sizes: Replicate the requests for small such as text and large like as images, video) content.

$http set size_ 2048  ;# Larger request size

  • Congestion Analysis: Establish the several HTTP flows and we follow the traffic impact.
  1. Experiment with Advanced Scenarios
  • HTTP/1.1 vs. HTTP/2: Replicate the persistent vs. multiplexed connections.
  • Impact of Latency: it has high broadcast delays and we analysis for HTTPS performance over WANs.
  • QoS Analysis: Estimate the effect of congestion prioritization for instance HTTP vs. HTTPS.
  1. Document Your Project
  • Include:
    • The document start with objectives
    • Then next process for the topology and Parameters
    • Then gives the simulation metrics for sample throughput, latency, packet loss
    • Finally it delivers the Observations and Conclusions.

This demonstration completely offers the step-by-step approach to setup the basic network simulation and helps to implement the HTTP/HTTPS projects in the ns2 simulation tool. We can also deliver the other details about its HTTP/HTTPS projects, if required