During February 2025, Jeong Dongwon authored comprehensive documentation for the 42srr/STUDY_CS repository, focusing on Chapter 2: Network Application Principles. The work detailed client-server and peer-to-peer architectures, inter-process communication using sockets, and the fundamentals of TCP and UDP transport services. By leveraging Markdown and applying networking fundamentals, Jeong clarified the operation of key application-layer protocols such as HTTP, SMTP, IMAP, and POP3. This documentation improved onboarding resources for contributors, enabling a clearer understanding of network programming concepts. The depth of coverage demonstrated both technical writing proficiency and a solid grasp of protocol layering and network topology concepts.