i have Question in mind that what is LDAP Server and what is it purpose.is it like any of the application server jboss,weblogic..etc..
if no where we need to use these LDAP servers in real world and how can i connect to these server from Java API.
what are all the different Vendors providing the LDAP servers.
An LDAP server is not an application server. Lightweight Directory Access Protocol is a way of accessing a directory over a network, the directory (or LDAP Server) can be something like Microsoft Active Directory which maintains an organized structure of user and group account information. You would normally use such a directory to provide the data for authentication and authorization. There are third party APIs to connect to specific LDAP servers, but the normal way is via JNDI.