Oracle 9i Database -- DBA Fundamentals II (2)

Basic Oracle Net Architecture

• On the client side, Oracle Net maintains information about location of server, handles protocol support by monitoring the different protocols involved, and copes with connection interrupts and exceptions. However, its association with the listener is based on the server side. Oracle client stack consists of Oracle Call Interface (OCI), most database APIs like JDBC, Perl-DBI etc. interface with OCI. However, the Listener is part of Oracle Net server stack.

• During a database session, the client uses OCI to interact with the server, whereas the server uses OPI to interact with the client.