Mini Internet Protocol Stack Simulator

A Python simulation of a simplified network stack implementing Layer 2 (Data Link), Layer 3 (Network), and Layer 4 (Transport) to deliver data between two hosts across a router.

Group Members

• Nour Zahrawi - 24106807
• Ben Holliday - 24443977

How to Run

python main.py <message_size>

Example:

python main.py 10    # sends a 10-byte message
python main.py 100   # sends a 100-byte message
python main.py 600   # sends a 600-byte message (triggers segmentation)

File Structure

File	Description
main.py	Entry point. Initialises devices, builds the message, and drives the end-to-end simulation
protocol.py	Header class definitions for all three layers: segment (L4), packet (L3), frame (L2)
devices.py	Host and Router class implementations handling all layer logic
config.py	Fixed network parameters: IP addresses, MAC addresses, routing tables, and interface definitions
README.md	This file

Network Topology

Host A ----------- Router R1 ----------- Host B
(10.0.1.10)   (10.0.1.1 / 10.0.2.1)   (10.0.2.20)

Requirements

• Python 3.x
• No external libraries required