PMKID

[slawson]

Obviously, this shows my ignorance,  but what's the technical reason that you can't pass the PMKID like Pass the hash?

[ZerBea]

It is mandatory to request the PMKID from an access point (EAPOL M1) or to retrieve it from a client (reassociation request).

[undeath]

I guess the question was meant to ask "why can you not use the PMKID to authenticate with a AP". Answer is simple: because the PMKID is not used in the WPA handshake.