A financial trading organization plans to monitor the network latency for multicast data feeds on a hop-by-hop basis. Which technology should be added to their design to support this requirement?

SPAN mirrors traffic to a monitoring port for capture and analysis but provides no timing or latency measurement capability on its own.

NBAR classifies and identifies application traffic types for QoS or policy enforcement but does not measure or report latency.

IPFIX exports flow metadata records to a collector for traffic accounting and analysis, but it lacks the precision timestamps required for hop-by-hop one-way latency measurement of multicast streams.

PTP (IEEE 1588) distributes a grandmaster clock signal to all participating network devices, achieving nanosecond-level synchronization that enables accurate one-way latency measurement at each hop. Without synchronized timestamps at every node, measuring unidirectional delay for multicast streams is not possible. Financial trading networks specifically rely on PTP to detect and audit microsecond-level latency variations in multicast market-data feeds on a hop-by-hop basis.