Latency & Jitter White Paper

In Networking Performance Evaluation
Xena Networks White Paper
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Latency & Jitter White Paper

Latency and jitter are two key measurement parameters when evaluating and benchmarking the performance of a network, system or device.

Different applications have different requirements on traffic latency and jitter. For example, voice over IP (VoIP) services are sensitive to latency and jitter, while data transfer is more tolerant to delay and jitter.

As key metrics of Quality of Service (QoS) validation, latency and jitter are often considered the basic benchmarking indicators by network administrators, operators, and engineers.

However, for benchmarking different network devices, the definition of latency and jitter can vary according to the RFC standard.

This white paper clarifies some of the terms used in time measurement, e.g. latency, jitter, inter-frame gap, latency resolution, speed mismatch, latency over time, and distribution.

It also presents how Xena interprets and implements time measurements and how to apply latency testing is included in the application note of Latency and Jitter in Networking Performance Evaluation, where users can find detailed guidelines and examples of time measurement using Xena test equipment.

Latency & Jitter White Paper – CONTENT


  • Last-to-First Latency Measurement for Store-and-Forward Devices
  • First-to-First Latency Measurement for Cut-Through Devices
  • Last-to-Last Latency Measurement for Layer 3 Packet
  • First-to-Last Latency Measurement of Frame Insertion Time. 6


  • Xena Jitter Measurement
  • MEF 10 Compliance
  • IFG Histogram and Jitter Analysis

Latency and Jitter Over Time

Latency and Jitter Distribution and Histograms

Latency Measurement Resolution

Speed Mismatch

Accurate Latency Measurement

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