What are the advantage and disadvantage about ntlm_auth and LDAP?

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There two type of method to integrate freeradius with AD, ntlm_auth
and ldap, with help by experts such as Alan DeKok and Nicolas
Baradakis , I had been setup the 802.1x+freeradius+ntlm_auth+AD. and I
wonder what are the advantage and disadvantage about ldap and
ntlm_auth.LDAP sounds better than ntlm_auth, is that right?
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He is nothing