Networking is a very broad topic, with many aspects to learn. Countless books, articles, papers and seminars have been created. Here are just a couple for additional reading on Ethernet and Networking
Comer, Douglas E., [2000], "Internetworking with TCP/IP; Principles, Protocols, and Architetures", Fourth Edition, Prentice-Hall, Upper Saddle River, NJ
Feit, Dr Sidnie [2000], "Local Area High Speed Networks", First Edition, MTP, 201 West 103rd St, Indianapolis, IN
Institute of Electrical and Electronics Engineers, Inc., [2002] "802 IEEE Standard for Local and Metropolitan Area Networks; Overview and Architecture", IEEE, New York, NY
Kadambi, J., Kalkunte, M. Crayford, I., [1998], "Gigabit Ethernet; Migrating to High-Bandwidth LANs", Prentice-Hall PTR, Upper Saddle River, NJ