Certified Ethical Hacker (CEH v11) — Question 13

Identify the UDP port that Network Time Protocol (NTP) uses as its primary means of communication?

Answer options

• A. 113
• B. 69
• C. 123
• D. 161

Correct answer: C

Explanation

The correct answer is C, as NTP uses UDP port 123 for its primary communication. The other options represent ports used by different protocols: port 113 is for Authentication, port 69 is for Trivial File Transfer Protocol (TFTP), and port 161 is for Simple Network Management Protocol (SNMP).