Which two statements are true about Oracle network connections?
A.
A listener may listen on behalf of only one database instance at a time.
B.
A server process checks a user’s authentication credentials and creates a session if the credentials are
valid.
C.
The listener continuously monitors a connection after the user process connects to a service handler.
D.
The listener always spawns a new server process to deal with each new connection.
E.
A connection request from a client is always first received by a listener running on the port that is used for
the connection request for the database server.