Université Catholique de Louvain: Olivier Bonaventure's "Computer Networking: Principles, Protocols, and Practice"
Read "Ethernet Switches" on pages 234-237. Stop at "The Spanning Tree Protocol (802.1d)," which you will read below. As you read, consider the following questions: What is an Ethernet switch? How does it function in the datalink layer? How does it utilize Medium Access Control mechanisms?