7.1.3 - Precision Time Protocol (PTP) Flashcards

Flashcards about the Precision Time Protocol (PTP)

What is the role of a Grandmaster clock in a PTP domain?

It is the authoritative time source.

What is a Boundary Clock in the context of PTP?

A clock with interfaces in multiple PTP segments.

What is the function of the Ordinary Clock?

A clock with a single PTP interface.

What are the network applications that commonly use Precision Time Protocol (PTP) due to its high accuracy?

Networks supporting industrial processes, 5G cellular data, medical devices, market trading and financial services, or broadcasting.

What level of precision does NTP provide compared to PTP?

NTP provides millisecond precision, while PTP provides nanosecond precision.

In the context of PTP, what are the timeTransmitter and timeReceiver roles?

When two clocks are connected, one interface has a timeTransmitter role, sending the time, and the other has a timeReceiver role, receiving the time.

Which role does the grandmaster clock's interfaces always have?

timeTransmitter.

What role do Ordinary clock interfaces usually have?

timeReceiver.

What is the function of transparent clocks in PTP?

They measure path delay and adjust P2P messages to compensate.

How does the accuracy of PTP over IP (Layer 3) compare to a Layer 2 implementation with compatible hardware?

PTP deployed as a layer 3 protocol over IP will not work as accurately as a layer 2 implementation with PTP-compatible hardware-timestamping adapters and switches.