What is SLAPD and LDAP ?
SLAPD is the Standalone LDAP Daemon. LDAP is the Lightweight Directory Access Protocol. It was developed by The University of Michigan and the Internet Engineering Task Force (IETF) as defined in RFC 1777 and (for v3) 2251. It is the TCP/IP standard for directory access, based on the DAP protocol used in the International Standards Organization X.500 specification for OSI protocols, developed circa 1988. Since its inception in 1992, LDAP has emerged as the dominant standard White Pages service to lookup network objects by name. Netscape, Microsoft, Novell and many other vendors have now adopted the standard for their client products to lookup e-mail addresses, phone numbers and other departmental information. Netscape Communicator 4.0 or greater, and Microsoft Internet Explorer 4.0 both support LDAP servers as remote Addressbook servers. Both these products, and many others work using the aeSLAPD server.