Briefing Amazon Knowledge

True or False: When you add a rule to a DB security gro…

True or False: When you add a rule to a DB security group, you do not need to specify port number or protocol.

A.
Depends on the RDMS used

B.
TRUE

C.
FALSE

Explanation:
You no need to specify Port or Protocol for DB security group. Only VPC/instance security group only needed.
http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Overview.RDSSecurityGroups.html