Explore undergraduate-level concepts in data communications systems and networks through this comprehensive 2.5-hour lecture series. Delve into the fundamentals of networking, including the OSI model, SI and IEC prefixes, and methods for measuring network transfers. Gain insights into the physical layer, understanding bandwidth, signaling, and modulation techniques. Examine throughput and its implications on network performance. Investigate the data link layer, focusing on MAC addressing and its role in network communication. Enhance your knowledge with practical network transfer examples, providing a solid foundation for further studies in computer networking and telecommunications.