What is a difference "Auth-Type eap"(with Auth-Type) and "eap"(without Auth-Type) in the "authenticate" section?

19 Feb 2019

      Hello, members.

Could you tell me what is a difference  "Auth-Type eap"(with Auth-Type) and
"eap"(without Auth-Type)  in the "authenticate" section? Below is an example.
What document should I read?

Best regards.

  (1) MS-CHAP
  authenticate {
    #
    #  MSCHAP authentication.
    Auth-Type MS-CHAP {
            mschap
    }

    #
    #  For old names, too.
    #
    mschap

  }

  (2) EAP
  authenticate {

    eap

    #
    #  The older configurations sent a number of attributes in
    #  Access-Challenge packets, which wasn't strictly correct.
    #  If you want to filter out these attributes, uncomment
    #  the following lines.
    #
   Auth-Type eap {
           eap {
                   handled = 1
           }
           if (handled && (Response-Packet-Type == Access-Challenge)) {
                   attr_filter.access_challenge.post-auth
                   handled  # override the "updated" code from attr_filter
           }
   }
  }

Environment

* OS: CentOS7
* FreeRADIUS: 3.0.13

-- 
Hiroyuki Sato