Network Analysis and Packet Crafting with Python Scapy

Understanding how network traffic flows is essential for cybersecurity and systems administration. Reading and writing raw network packets allows you to analyze security vulnerabilities and diagnose connectivity issues from the ground up. This text-only course guides you through the fundamentals of packet manipulation using the powerful Scapy library in Python. You will transition from understanding basic network protocols to writing scripts that craft, send, sniff, and analyze custom network packets. What you'll learn: Understand core networking concepts, protocol layers, and the structure of IP, TCP, UDP, and ICMP packets; Craft custom network packets from scratch using Python and the Scapy library; Implement custom port scanners and network discovery tools using structured Python code; Sniff and parse live network traffic to extract key packet metadata and payload information; Apply modern Python practices, including virtual environments and type hints, to write clean, maintainable networking scripts; Practice packet analysis techniques safely in a controlled local environment. The course begins with foundational networking definitions and protocol basics before moving step-by-step into writing Scapy scripts. You will read through clear code examples, learn how to parse responses, and build practical network analysis tools. This course is designed for beginners in network security and Python developers looking to expand their systems programming skills. No prior network engineering experience is required. Start reading to master the art of network packet manipulation with Python.