Which four statements are true about services and connection load balancing?

Which four statements are true about services and connection load balancing?

A.
Services provide the ability to balance client connections across the instances in an Oracle
RAC configuration.

B.
There are two types of load balancing that you can implement; load balancing decisions can be
made by the client and by the listener.

C.
In a RAC database environment, you should select only one load balancing method.

D.
With server-side load balancing, the listener directs a connection request to the best instance
that is currently providing the service based on the load-balancing options selected by the DBA.

E.
Client-side load balancing balances the connection requests across the listeners.

Explanation:
Services and Connection Load Balancing
The two load balancing methods that you can implement are:
Client-side load balancing: Balances the connection requests across the listeners
Server-side load balancing: The listener directs a connection request to the best instance
currently providing the service by using the load balancing advisory (LBA).
FAN, Fast Connection Failover, and LBA depend on a connection load balancing configuration
that includes setting the connection load balancing goal for the service.
The load balancing goal for the service can be either:
LONG: For applications having long-lived connections. This is typical for connection pools and
SQL*Forms sessions.
SHORT: For applications that have short-lived connection
Oracle Net Services provides the ability to balance client connections across the instances in an
Oracle RAC configuration. You can implement two types of load balancing: client-side and server-side.
Client-side load balancing balances the connection requests across the listeners.

With server-side load balancing, the listener directs a connection request to the best instance
currently providing the service by using the load balancing advisory.
In a RAC database, client connections should use both types of connection load balancing.
D60488GC11
Oracle 11g: RAC and Grid Infrastructure Administration Accelerated 15 12