Computer Networks 13.1.3

How many packets per minutes are required to keep two machines synchronized to an accuracy of a millisecond of each other?

1

You need to set the time zone for Pacific Daylight Time. Which two of the following commands will allow you to do this?

Clock timezone PST Clock timezone -8

The time difference is large, and it is taking some time for NTP to synchronize the time on the local router. To speed synchronization, you use NTP commands to immediately synchronize the time on the router with the time on the time provider. Which NTP term best describes this process?

Slam

It is taking some time for NTP to synchronize the time on the local router. After about 15 minutes, the time finally synchronizes. Which NTP term best describes this process?

Slew

You have noticed that every two weeks or so, a client's clock is off by two minutes, even after you have adjusted it. What is this issue known as?

Time drift

Which of the following statements are true regarding NTP when implemented on Cisco devices? (Select two.)

When NTP is enabled, NTP packets are received on all interfaces. NTP runs over UDP port 123.

You check the time on a router and find that it is behind by several minutes. To fix this issue, you decide to configure NTP on the router to get time from a Stratum 2 time provider on the internet with a hostname of 0.pool.ntp.org. Which command should you use?

ntp server 0.pool.ntp.org

Currently, all of the routers in your network are configured to use NTP to synchronize time with a public Stratum 2 time provider on the internet. To reduce redundant network traffic, you decide to configure one internal router as an authoritative NTP time provider with a stratum value of 5 and then configure all other routers to synchronize time with it. This router has an IP address of 172.17.8.254 assigned. Which commands should you use? (Select two. Each response is a part of the complete solution.)

ntp master 5 on the NTP time provider router. ntp server 172.17.8.254 on all routers except the time provider.

router to get time from an internal authoritative (master) NTP server with an IP address of 172.17.8.254. Which command should you use?

ntp server 172.17.8.254

You need to verify that time is synchronized on a router. Which commands could you use to do this? (Select two. Each response is a complete solution.)

show ntp associations show ntp status