Which ports should be blocked to prevent null session enumeration?

Which ports should be blocked to prevent null session enumeration?

Q. Which ports should be blocked to prevent null session enumeration?

A.            Ports 120 and 445

B.            Ports 135 and 136

C.            Ports 110 and 137

D.            Ports 135 and 139

Answer: Ports 135 and 139

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