Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) v1.2InfrastructureMedium
A network administrator needs to ensure that all network devices in a large enterprise network have synchronized clocks to facilitate accurate log correlation and troubleshooting. The administrator wants to configure a central NTP server and have all other devices synchronize with it. Which NTP mode should be configured on the client devices to obtain time from the central server?
- ANTP Client mode
- BNTP Broadcast mode
- CNTP Peer mode
- DNTP Symmetric Active mode
Show answer & explanationAnswer & explanation
Correct answer: A. NTP Client mode
NTP Client mode is the most common configuration for devices that need to synchronize their clocks with a central NTP server. In this mode, the client sends requests to the server and adjusts its clock based on the server's responses, without providing time back to the server.
Why the other options are wrong
- B. NTP Broadcast mode is less accurate and suitable for segments with many clients and no need for high precision, generally not recommended for enterprise.
- C. NTP Peer mode is similar to symmetric active, where two devices can synchronize with each other and also provide time to each other.
- D. Symmetric Active mode is for devices that act as both server and client to each other, typically between primary time servers.
NTP Client Mode
A Network Time Protocol (NTP) mode where a device (client) requests time from an NTP server and adjusts its own clock based on the server's responses, without acting as a time source for other devices.
- Most common mode for end devices to synchronize time.
- Unidirectional time synchronization (client pulls from server).
- Simple to configure and provides accurate time.
Memory trick: Clients Connect, Servers Serve Time