CertExams.com Simulator Lab Exercises Answers

Configure and Verify NTP

Description: Network Time Protocol (NTP) is a networking protocol designed to time-synchronize device with in a network. NTP time server works within the TCP/IP suite and uses User Datagram Protocol (UDP) port 123 as its transport protocol. An NTP network usually receives its time from an authoritative time resource, such as an atomic clock or a radio clock attached to a time server and distributes this time across the network.

NTP servers are normally dedicated NTP devices that use a single time reference to which they can synchronize a network. This time reference is a Coordinated Universal Time (UTC) source, a global time scale distributed by atomic clocks over the internet. The dedicated NTP servers are required for Security, Accuracy, Protection, Legality, and Control.


1. Enter the global configuration mode

2. Configure router R1 as NTP master also called authoritative NTP server. Number 3 shows stratum level.

3. Configure router R2 as NTP client

4. Verity that R2 has obtained the correct time and date from R1 via NTP by using “show NTP associations” command.

 Please refer to the CertExams.com Network Simulator software for complete lab with commands. 

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