Wired: What are the challenges with working and making a communications network in space as opposed to a ground-based internet?
Cerf: Among the hard things, first of all, is that we couldn’t use the domain name system in its current form. I can give you a quick illustration why that’s the case: Imagine for a moment you’re on Mars, and somebody is trying to open up an HTTP web connection to Earth. They’ve given you a URL that contains a domain name in it, but before you can open up a TCP connection you need to have an IP address.
What did you work on today? I certainly didn’t work on anything as cool as figuring out how to click a link on Mars.