Standard NTP (Network Time Protocol) rules network time globally, while “NTPsync” is not a distinct network protocol, but rather a generic term or software-level mechanism used to describe the basic client act of forcefully syncing time. Standard NTP remains the undisputed internet standard for time keeping. The Core Difference
The distinction comes down to the underlying engineering of how time is maintained:
Standard NTP (The Protocol): A highly complex, continuous architectural protocol defined by IETF RFC 5905. It uses a hierarchical “Stratum” system of time servers to continually monitor network delays, filter out jitter, and gradually adjust the system clock’s speed (slewing) rather than letting it jump abruptly.
NTP Sync (The Action / Simple Utilities): Frequently used to describe a one-off command or basic software client (like ntpdate or certain background scripts) that queries an NTP server and forces the local clock to match it instantly. It lacks the ongoing statistical filtering of the full NTP protocol daemon. Protocol Comparison What Is NTP? A Beginner’s Guide to Network Time Protocol
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