CCNA: Cisco Certified Network Associate — Question 418

Which two statements about NTP operations are true? (Choose two.)

Answer options

• A. NTP uses UDP over IP.
• B. Cisco routers can act as both NTP authoritative servers and NTP clients.
• C. Cisco routers can act only as NTP servers.
• D. Cisco routers can act only as NTP clients.
• E. NTP uses TCP over IP.

Correct answer: A, B

Explanation

The correct answers are A and B because NTP indeed operates over UDP, which is more efficient for time synchronization, and Cisco routers can serve dual roles as both NTP authoritative servers and clients. The other options (C, D, and E) are incorrect as they misstate the capabilities of Cisco routers and the transport protocol used by NTP.