Understanding Network Configuration

Understanding Network Configuration
A client is any application that connects to Oracle Database to send or retrieve data.
An Oracle Database client application can reside on any computer that has Oracle
Database client software installed.
Oracle Net is a software layer that resides on the client computer and on the Oracle
Database host computer. It establishes and maintains the connection between the
client application and the database over a network, and exchanges messages between
them using industry standard protocols.
For a client application and a database to communicate, the client application must be
able to identify the database it wants to connect to, and the database must provide an
identification. You can use a service name to connect to a database. A service name is
a logical representation of a database, which is the way a database is presented to
clients. A single database can be presented as multiple services.
Service names can provide location transparency so that the client application does not
have to know the server's location. If the database is moved to another location, then
you must reconfigure only Oracle Net. No changes are necessary to client applications.
This section contains these topics:
■ Oracle Net Listener Configuration
■ Client Connections
■ Tools for Network Configuration
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