Contributed educational resources to the kamranahmedse/developer-roadmap repository by developing new learning materials focused on network fundamentals, specifically ARP and Ethernet. The work involved creating and integrating two educational videos and updating Markdown-based documentation to enhance clarity and coverage of these core networking topics. Emphasizing educational content creation and documentation, the approach aligned with repository guidelines to support user engagement and learning outcomes. Maintained a concise, traceable commit history to facilitate future maintenance and audits. The contribution addressed the need for accessible, well-structured networking resources, leveraging skills in networking concepts, Markdown, and instructional design to improve the roadmap’s educational value.