What Is the Difference Between LDAP and Active Directory?
Active Directory runs on Windows Server and allows administrators to manage permissions and access to network resources. Active Directory stores data as objects. In order for a directory like AD to work, a protocol for querying, maintaining, and authenticating access to it must be in place. LDAP, or Lightweight Directory Access Protocol, is one such protocol. It is a client-server protocol.
The central protocol of AD is LDAP. When a client searches for a particular object in AD (such as a user or a printer), LDAP is used to query related objects and return the correct results.