Precision Time Protocol (PTP) follows a hierarchical architecture that operates on a parent-child model, where synchronization messages are sent from parent clocks to child clocks to maintain time accuracy across the network.
At the top of the hierarchy is the Primary Clock, which serves as the ultimate synchronization source for the entire network. The Primary Clock is typically a highly accurate time source, such as a GPS receiver, ensuring precise time distribution.
The next level in the hierarchy is the Boundary Clock, which acts as an intermediary. It synchronizes multiple devices connected to it, ensuring that each device maintains accurate time by passing synchronization messages through the network.
At the lowest level are Ordinary Clocks, which are child devices that synchronize their time by receiving messages from a parent clock, either the Primary or a Boundary Clock. These devices adjust their internal clocks based on the synchronization data they receive to maintain time consistency.