It's not necessarily equivalent to a recursive lookup, you can ask a cache for all the answers because you already know the root keys a priori. But yes, it does follow the entire chain of trust, that's the entire point of dnssec: if you don't do that the whole exercise is utterly pointless.
tptacek|1 day ago
I agree with you, though. It's utterly pointless.
jcalvinowens|1 day ago