Automatic Repeat ReQuest Simulator

This simulates a stop and wait ARQ protocol with modifiable simulation constraints.

Setup instructions

• Install nodeJS
• Run npm install in the directory. This will install all the required modules.

Usage instructions

• For Reciever : Run node reciever.js [port] eg - node reciever.js 3000
• For Sender : Run node sender.js [ip] [port] [message] eg - node sender.js 127.0.0.1 3000 Hello_World

More information

• All logs are prepended by [LAYER_NAME] which shows which layer is logging the information.
• Frame drops is simulated by just not sending the frame at all. The probability for this can be changed by modifying the LOSS_PROBABLITY in const.js.
• Frame damage is simulated by just making the type DAMAGED. The probability for this can be changed by modifying the CORRUPTION_PROBABILITY in const.js.

References

• Computer Networks by Andrew S. Tanenbaum, David J. Wetherall