As part of its ongoing commitment to strengthening academic knowledge and advancing scientific understanding in computer networks and digital communications, Prof. Dr. Ali Kadhim Al-Bairmani delivered a specialized scientific lecture entitled “Data Link Layer” to third-year students of the Department of Computer Engineering Technology, College of Engineering Technology, at Al-Mustaqbal University. The lecture was conducted within the framework of the Network Protocols course, aiming to enhance students’ theoretical knowledge and deepen their understanding of layered network architectures and data exchange mechanisms between interconnected devices. The lecture highlighted the scientific foundations and technical functions of the Data Link Layer, which represents the second layer of the Open Systems Interconnection (OSI) Reference Model. Particular emphasis was placed on its essential role in organizing data transmission across network links and facilitating communication between adjacent network nodes through standardized mechanisms and protocols. During the lecture, Prof. Dr. Ali Kadhim Al-Bairmani presented a comprehensive overview of the fundamental functions of the Data Link Layer, including data framing, Media Access Control (MAC), and error detection mechanisms. The discussion addressed how data is organized into transmission units known as frames, how access to shared communication media is regulated, and how transmission errors can be identified. These functions play a significant role in supporting reliable data exchange and improving communication efficiency within computer networks. The lecture also emphasized the functional integration of the Data Link Layer with other layers of the OSI model, highlighting the importance of network protocols in regulating information flow and coordinating data exchange between connected devices. This approach contributed to developing a comprehensive scientific understanding of computer network architecture and the engineering principles underlying modern communication technologies. Furthermore, the lecture aimed to enhance students’ analytical skills and technical competencies in network protocols, data transmission, and digital communications by connecting theoretical concepts with the operational functions of networking systems. It also sought to strengthen their ability to understand data processing and transmission mechanisms, establishing a solid academic foundation for studying, designing, and evaluating computer networks. The lecture witnessed excellent attendance and active participation from third-year students, reflecting their strong interest in specialized technological disciplines and their commitment to expanding their knowledge of network engineering and communication protocols. Such academic engagement contributes to preparing students to keep pace with rapid technological advancements in telecommunications and information technology. This scientific lecture forms part of the educational and academic activities organized by the Department of Computer Engineering Technology, reflecting Al-Mustaqbal University's continuous efforts to enhance the quality of engineering education, strengthen the integration of theoretical knowledge with technical applications, and prepare highly qualified engineering graduates equipped with the scientific and technological competencies required to meet the evolving demands of the labor market. These initiatives are aligned with the United Nations Sustainable Development Goal 4 (SDG 4): Quality Education, which emphasizes the importance of providing high-quality university education, improving learning outcomes, and developing specialized human competencies in engineering and technological fields. Al-Mustaqbal University – Ranked First Among Private Universities in Iraq. Department of Computer Engineering Technology