What is Network Time Protocol (NTP)? - Definition from WhatIs.com
Network Time Protocol - Wikipedia
Stratum 1 Raspberry Pi Time Server - My Wushu Blog
NTP Server
What is Stratum 1? | EndRun Technologies
Aaron Toponce : Real Life NTP
The covert channel two uses the stratum values in NTP server packets to... | Download Scientific Diagram
Detailed hierarchy of the Stratum servers | Download Scientific Diagram
Jeff Kronlage's CCIE Study Blog: NTP
HOW to setup an NTP Cluster
NTP: The Network Time Protocol
Network Time Protocol (NTP). Network Time Protocol (NTP) is a… | by lewis malim | Medium
What NTP stratum level is a server that is connected directly to an authoritative time source?
Changing NTP server based on available connections - Unix & Linux Stack Exchange
Setting up a Replica Server (Stratum 1) — CernVM-FS 2.8.2 documentation
What is a Stratum 1 Time Server? - NTP | TimeTools Ltd
NTP Server – Stratum Levels Explained | NTP Server
NTP architecture
How to Install and Configure NTP Server and Client on Debian
