Same reason that "com" and "net" aren't. Root nodes aren't, from my understanding, valid names for machines. Edit: Seems I'm wrong. See discussion downthread

Same reason that "com" and "net" aren't. Root nodes aren't, from my understanding, valid names for machines. Edit: Seems I'm wrong. See discussion downthread: http://news.ycombinator.com/item?id=4105707 http://news.ycombinator.com/item?id=4105707