What does your client connection do using this connect string?
net_service_name=
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST=sales1-svr-vip)(PORT=1521))
(ADDRESS=(PROTOCOL=tcp)(HOST=sales2-svr-vip)(PORT=1521)))
(CONNECT_DATA=(SERVICE_NAME=sales.us.acme.com)))
A.
It connects you to the least loaded node.
B.
It always connects you to the first protocol address.
C.
It randomizes its connection on the available listeners.
D.
It tries the protocol addresses sequentially until one succeeds.