A network protocol address of the listener.
When a connection is made, the client and the listener are configured with identical protocol addresses. The client uses this address to send the connection request to a particular listener location, and the listener "listens" for requests on this address.
An example address is shown next:
(ADDRESS= (PROTOCOL=tcp) (HOST=sales-server) (PORT=1521))
The protocol parameters in the address are dependent on the protocol selected.