What is Network Time Protocol (NTP)? - Definition from WhatIs.com
What NTP stratum level is a server that is connected directly to an authoritative time source?
What happened here? Bad Stratum 7 13 and 15 - Server operators - NTP Pool Project
NTP architecture
NTP Server
Detailed hierarchy of the Stratum servers | Download Scientific Diagram
Network Time Protocol (NTP) Best Practices | TimeTools Ltd
Stratum 1 - NTP Time Server | RNTrust
HOW to setup an NTP Cluster
NTP Stratum | ESE
NTP Server – Stratum Levels Explained | NTP Server
What is Windows's time server synchronisation precision? (and does it compensate the ping time?) - Super User
350-401 Exam Dumps | Which measure is used by an NTP server to indicate its closeness to the authoritative time source?
The covert channel two uses the stratum values in NTP server packets to... | Download Scientific Diagram
Jeff Kronlage's CCIE Study Blog: NTP
Setting up a Replica Server (Stratum 1) — CernVM-FS 2.8.2 documentation
What is Stratum 1? | EndRun Technologies
NTP Server – Stratum Levels Explained | NTP Server
Stratum 1 - NTP Time Server | RNTrust
NTP hierarchy
Wiring the ESP8266 12/12E as NTP Network Time Protocol via UDP as Stand Alone | 14core.com
How to Install and Configure NTP Server and Client on Debian
Changing NTP server based on available connections - Unix & Linux Stack Exchange
Setting Up an SNTP Server
Aaron Toponce : Real Life NTP
