Latency metrics are used to measure what aspect of data communication?

Latency metrics are crucial in understanding the efficiency of data communication, specifically focusing on the time it takes for data to travel from one location to another. This measurement is essential because it affects the performance of applications and services, especially in real-time environments like video conferencing and online gaming. A lower latency indicates faster delivery of data, which enhances user experience and system responsiveness.

The other options relate to different aspects of data communication. Clarity of data pertains more to how understandable or interpretable the data is, rather than the speed of its transmission. The amount of data processed concerns throughput rather than latency, emphasizing quantity and capacity instead of the time taken for data transmission. Lastly, the accuracy of data transmission addresses how faithfully data is delivered without error but does not consider the speed at which this occurs. Thus, option B accurately reflects what latency metrics are designed to measure.