===== PEAP (Protected EAP) =====
  * Anon Identity
  * CA Cert
  * PEAP version
  * Inner authentication (MSCHAPv2/MD5/GTC)
  * Username/Password

===== LEAP =====
  * Username/Password

===== TLS =====
  * Identity
  * CA cert
  * User cert/Private key

===== FAST =====
  * Anon Identity
  * PAC file
  * PAC provisioning
  * Inner authentication (MSCHAPv2/GTC)
  * Username/Password

===== Tunneled TLS =====
  * Anon Identity
  * CA cert
  * Inner authentication (PAP/MSCHAP/MSCHAPv2/CHAP/MD5/GTC)
  * Username/Password

===== PWD =====
  * Username/Password

^ Auth ^ CA Cert ^ "User Cert/Priv Key" ^ "Username/Password" ^ Anon Ident ^ Inner auth ^ PEAP Version ^ PAC file/prov ^ Ident ^
| PEAP | (V)     |                      | (V)                 | (V)        | (V)        | (V)          |               |       |
| LEAP |         |                      | (V)                 |            |            |              |               |       |
| TLS  | (V)     | (V)                  |                     |            |            |              |               | (V)   |
| FAST |         |                      | (V)                 | (V)        | (V)        |              | (V)           |       |
| TTLS | (V)     |                      | (V)                 | (V)        | (V)        |              |               |       |
| PWD  |         |                      | (V)                 |            |            |              |               |       |

http://www.tech-faq.com/eap-leap-peap-and-eap-tls-and-eap-ttls.html