Invented in the 1980's by Bob Metcalfe - Ethernet revolutionazed bandwidth and connectivity in Local Area Networks (LANS). Today Ethernet is used to provide services around the world and is used not only in the LAN, but the WAN as well. We can no longer simply call in a LAN protocol. As the protocol has developed, so have the features and functions. Learning Ethernet switching is crucial in todays networks for anyone in the networking field.