In networking, what is the main function of latency?

Latency refers to the delay before a transfer of data begins following an instruction for its transfer. Specifically, it measures the response time it takes for data to travel from the source to the destination. This response time is crucial in various networking applications, especially in real-time communications, online gaming, and streaming services, where delays can significantly affect user experience.

Understanding latency allows network engineers and administrators to identify performance bottlenecks, optimize network configurations, and implement solutions to reduce delays, thus improving overall efficiency and responsiveness in data transmission. By grasping the concept of latency, one can better appreciate its impact on network performance and user satisfaction.