Common PTP Device Types | CCIE Data Center Exam Answer

Common PTP Device Types


Which three options are common PTP device types? (Choose three.)



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A. B. C. D. E. F.


The Precision Time Protocol (PTP) is a protocol used to synchronize the clocks of networked devices with a high degree of accuracy. It is often used in environments where precise timing is essential, such as financial trading systems, scientific research, and telecommunications.

Here are explanations of the three common PTP device types:

  1. Network Clock: A Network Clock is a device that provides accurate time to other devices on the network. It is considered to be the most accurate source of time on the network and is used as a reference by other PTP devices. A Network Clock can be synchronized with an external time source, such as a GPS receiver or an atomic clock, to provide highly accurate time.

  2. Boundary Clock: A Boundary Clock is a device that acts as a PTP proxy between the Grandmaster Clock and other devices on the network. It helps to manage network traffic and reduce the amount of PTP traffic that needs to be transmitted across the network. A Boundary Clock can also act as a backup Grandmaster Clock if the primary Grandmaster Clock fails.

  3. Transparent Clock: A Transparent Clock is a device that receives PTP messages and modifies the timestamps in the messages to compensate for the delay introduced by the network. It helps to improve the accuracy of the PTP synchronization by reducing the impact of network delay. A Transparent Clock does not act as a Grandmaster Clock or a Slave Clock and does not modify the synchronization algorithm.

The other options mentioned in the question, Sundials, Ordinary Clocks, and Crystal Clocks, are not commonly used as PTP devices. Sundials are a traditional timekeeping device that uses the position of the sun to tell time. Ordinary Clocks and Crystal Clocks are general-purpose clocks that do not have the accuracy or precision required for PTP synchronization.