JNDI stands for Java Naming and Directory Interface. It comes standard with J2EE. With this API, you can access many types of data, like objects, devices, files of naming and directory services, eg. it is used by EJB to find remote objects. JNDI is designed to provide a common interface to access existing services like DNS, NDS, LDAP, CORBA and RMI.
In-house 
= answered, 
= unanswered