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A new policy prohibits external access to database servers. A recent external port scan identified the following open Transmission Control Protocol (TCP) ports: - 21 - 25 - 68 - 80 - 389 - 443 - 587 - 1514 - 3306 - 3389 - 8080 Which of the ports must be closed to be compliant with the new policy? (Choose two.)
Correct Answer: D,E
Port 3306 is the default port used by MySQL database servers. Allowing external access to this port directly exposes the database service, which violates a policy that prohibits external access to database servers. Port 3389 is used by Remote Desktop Protocol (RDP). External access through RDP allows direct administrative or user access to the server hosting the database, which effectively bypasses the restriction against external access to database servers and therefore must also be closed to comply with the policy.