The wi-fi protected access (wpa2) uses to obtain a master key, which is in turn used to negotiate for a key that will be used for a session.

I am definitely sure that wpa2 uses Extensible Authentication Protocol (EAP) to obtain a master key, which is in turn used to negotiate for a key that will be used for a session. It provides the transport and usage of key which is generated by EAP methods. It's widely used in p2p (point-to-point) connections and wireless networks.

Idon’t know this one