Examine this tnsnames entry from a RAC configuration using a SCAN listener:
HR=(DESCRIPTION=
(LOAD_BALANCE =on)
(ADDRESS=(PROTOCOL=TCP)(HOST=cluster01-scan)(FORT=1521))
(CONNECT_DATA=(SERVICE_NAME=HRSRV)))
Which two statements are true about clients using this entry to connect? (Choose two.)
- A.The host name in the tnsnames entry must be changed if nodes are added or removed from the Cluster.
- B.Clients using EZConnect can benefit from connect time load balancing because the tnsnames entry refers to a SCAN listener.
- C.Client connection requests are automatically balanced across all IP addresses defined for the SCAN.
- D.A client connection request is received by a SCAN listener that creates the connection to the least-loaded database instance.
- E.Client connection requests are automatically failed over to another SCAN listener if the chosen SCAN listener is not available.