This document provides an overview of Ethernet networking including: 1. Ethernet uses layers 1 and 2 of the OSI model and the Network Access layer of the TCP/IP model. It evolved from early LAN technologies and uses frames, MAC addressing, and CSMA/CD. 2. Switches avoid collisions by forwarding frames only to destination ports, improving performance over hubs. Higher bandwidth standards like Fast Ethernet and Gigabit Ethernet require full-duplex links without collisions. 3. Ethernet addressing uses MAC addresses to identify devices locally and IP addresses to route between networks. ARP resolves IP addresses to MAC addresses to allow communication between hosts.