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John is performing a port scan of a network as part of a security audit. He notices that the domain controller is using secure LDAP. Which of the following ports would lead him to that conclusion?

Answer Options

A

53

B

389

C

443

D

636

Correct Answer: D

Explanation

Secure Lightweight Directory Access Protocol (LDAPS) uses port 636 by default. DNS uses port 53, LDAP uses 389, and secure HTTP uses port 443.

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