NTP Mini-Classroom

Easy to understand "time synchronization protocol" NTP

NTP is the invisible "master of time management". In the simplest language, from the daily phenomenon, to take you from the ground up to recognize this important and interesting network protocol.

A minute to show you the core difference between NTP and regular servers

Today we're going to talk about one of the fundamental protocols that underpins the entire Internet, but is most often overlooked - NTP.

How does a Linux server synchronize time with an NTP server?

This video focuses on a configuration demonstration to help you quickly understand how Linux time synchronization is implemented.

How does the switch synchronize time with an NTP server?

This issue's video covers device login and time synchronization configuration, to operational state verification and configuration saving.

NTP status normal time but not synchronized?

In this video, we'll troubleshoot why the NTP status clearly seems normal, but the time just won't synchronize, based on real customer cases.

Who invented NTP? Why is NTP still widely used after more than 40 years?

A protocol that was born in 1985 and is "older" than many Internet users, but still quietly calibrates the time for devices around the world every day, is NTP.

How is the NTP time deviation calculated?

This video will use animation to completely disassemble the NTP core algorithm, showing how NTP can complete accurate clock synchronization in a jittery network with only four timestamps (T1,T2,T3,T4).

Why does NTP use UDP instead of TCP?

A 1-minute look at a counter-intuitive truth, ending with a look at why the more "reliable" TCP is, the easier time drifts.

Quick diagnosis of NTP/chrony time sources

Teach you to quickly determine whether the NTP/chrony time source is normal, to master the 3 core determination points, to avoid the risk of operation and maintenance, quickly click the video to learn!

Difference between server and pool in NTP configuration

Take you to understand the core difference between server and pool, understand the difference between these two, no longer afraid of the server room time synchronization problems!

Parameters to make the server time synchronization fast forward::iburst

Today I'm going to show you a trick to press the "fast-forward" button for NTP synchronization! All you need to do is add a small parameter called iburst to your configuration file.

Why does Burst go from being an "accuracy expert" to being a "network piggyback"?

burst is not "accelerated synchronization", but a multi-sample measurement mechanism. It improves accuracy by sending multiple requests in succession and selecting the least delayed samples from them.