Go back to 642-278 - Implementing CUCM for TelePresence Video Solutions Exam

Question :-

Which of the following accurately describes the use of NTP in a Cisco Unified Communications Manager cluster? (Choose four)
The endpoints derive their clock from NTP directly, or via SIP from Cisco Unified Communications Manager if NTP references are not configured in Cisco Communications Manager for the endpoints.
Cisco IOS Gateway always derive clock from Cisco unified Communications Manager via SIP. NIP is not required for gateways
NTP helps ensures that log files that are collected from Cisco Unified Communications Manager, endpoints and gateways contain correct date and time stamps.
An NTP server is required when installing the Cisco Unified Communications Manager publisher node
The Cisco Unified Communications manager subscriber nodes require NTP in order to properly synchronize with publisher nodeNTP is optional. Cisco Unified Communications Manager can provide a master clock reference to the entire cluster

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