The great thing about standards is that there are so many to choose from.
——Andrew S. Tanenbaum
Ethernet is the dominant wired LAN technology on the planet, the battle-scarred victor of more than a decade of LAN wars. This is great news because you really don’t have to learn more than one LAN technology to be an effective troubleshooter. Other technologies such as ArcNet, PhoneNet, AppleTalk, and Token-Ring, if they’re not already gone, are quickly melting off of the landscape.
In some sense, technology wars are neither here nor there for us as troubleshooters. We want to understand enough about the technology to be able to troubleshoot it: Extraneous details like political and marketing wars aren’t really too ...