Looking at the HDP docs for using AD or LDAP for Ranger in Ambari (https://docs.cloudera.com/HDPDocuments/HDP3/HDP-3.1.0/configuring-ranger-authe-with-unix-ldap-ad/con...), AD and LDAP appear to be treated as separate things (ie. are two different options):

Yet, when looking at the UI in my actual HDP (3.1.0.0-78) installation, it is shown as a single option "AD/LDAP" (which to me makes more sense, since LDAP is just a protocol to communicate with AD (not much experience with AD but that is what is seems to me)).

Can anyone with more LDAP/AD experience explain the difference? Anyone know the difference between using LDAP vs AD for Ranger integration?