During February 2025, Jeong Dongwon developed foundational documentation for the 42srr/STUDY_CS repository, focusing on Chapter 1 Network Fundamentals. He authored comprehensive Markdown materials that detail internet infrastructure, hosts, communication links, packet switching, network structures, delays, packet loss, and throughput in packet-switched networks. Leveraging his skills in computer networking and technical writing, Jeong established a reusable knowledge base designed to support onboarding and ongoing study. His approach emphasized clarity and maintainability, standardizing documentation practices within the repository. The depth of coverage in the documentation addressed core networking concepts, ensuring accessible and high-quality reference material for future contributors and learners.