Prior to his incarceration at ISC, he also served time at InterNetShare, Inc., Integrated Systems, Inc., Epilogue Technology Corporation, and MIT\'s Laboratory for Computer Science. After spending a number of years working on everything from mainframes to deeply embedded systems, Rob has at one time or another worked at almost every layer of the protocol stack, but feels most at home somewhere around layer 3. He is, however, probably best known for having wandered aimlessly into the early specification and deployment of the DNS, and, as a result, has spent entirely too much of the intervening time at layer 9. At present, Rob spends 50 weeks out of every year trying to figure out how (and why) the Internet works; the other two weeks of each year are usually devoted to gravitational research in the Tetons.