This paper explores the development of courses, resources, and textbooks of Network Fundamentals and Application under the integration of work, study, competition, and certification(WSCC) framework. The aim is to enhance the effectiveness of vocational education and technical skills training by organically integrating job training (work), course instruction (study), skills competitions (competition), and professional qualification certification (certification). Based on research into industry enterprises, examination points from skills competitions, and content from junior network engineer certification programs, this study proposes principles for modular curriculum design and emphasizes the importance of multimedia teaching resources, experimental training resource construction, and the integration of online and offline resources. An analysis of three years of teaching practice indicates that this model significantly improves students' theoretical knowledge and practical operational skills, thereby enhancing their employability. Additionally, a comprehensive system for monitoring teaching quality and an effective feedback mechanism have been established to ensure continuous improvement in educational quality.