I think I did OK. I was slightly ADDish, being hyperfocused yet forgetful, which was kind of annoying. I muffed remembering all the fields in an IP packet (I hadn't read RFC791 for quite a while), what an xid is in NFS (it's the transaction ID in RPC), and I have no idea wtf they meant by "state inspection". I slightly bobbled a few other things, but I think I got the gist across. They didn't start laughing and pointing as soon as they left the room, always a good sign.
Went home, tried not to fall asleep, geeked for a while, cleaned up, geeked some more, finally felt hungry around 9:30, and went to the grocery store where I found I had odd cravings for cheese and Vitamin C. I gave in to said urges, came home, and ate macaroni and cheese and typed this. I think I'm gonna sleep pretty well this evening.