A network administrator at a broadcasting company needs to ensure that video streams and audio feeds are synchronized across various devices on the network. Which protocol would be most effective for achieving the high-precision time synchronization required for this scenario?
Global Positioning System (GPS) time synchronization
Precision Time Protocol (PTP) is specifically designed for very high-accuracy clock synchronization over an IP/Ethernet network. In practice it can keep devices aligned to within sub-microsecond accuracy, and SMPTE ST 2059 adopts PTP for timing professional video and audio equipment. NTP is adequate for general computing but normally stays within the millisecond range on a LAN. Using a separate GPS receiver at every device can provide precise time but is costly and impractical indoors, and DHCP is unrelated to time synchronization.
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What is the Precision Time Protocol (PTP)?
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How does PTP differ from NTP?
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What are the main use cases for PTP in broadcasting?