"Ethernet was developed in the context of the internet with its seven levels of the ISO reference model," he said. "So we had a job to do at level one and two, and we didn't burden Ethernet with all the other stuff that we knew would be above us. We didn't do security, we didn't do encryption, we didn't even do acknowledgements."
Very interesting story—I wish it had been more detailed in places, but I love this middle section, about how simplicity sometimes beats complexity.
It's also amazing how prevalent Ethernet still is, even when wireless is a competitor. The other day I left this comment: http://news.ycombinator.com/item?id=5052448 on HN, because in some circumstances running a cheap ethernet cable from a router to a desk, couch, or other work station can still be a real win, especially given how inexpensive even very long ethernet cables are from Monoprice.com.
They last forever, aren't subject to the level of interference wireless is, and, in many conditions, have faster data transfer speeds. Ethernet is still great.