A signal’s transmission time plus the time for an acknowledgment of receipt is the Round-Trip Delay (RTD). This time delay includes the propagation times for the paths between the two communication endpoints. In computer networks, the signal is typically a data packet.
How RTD is Measured
RTD is commonly measured using the ping command, which sends a packet and measures the time it takes to receive a response. However, the ping time may differ from the experienced RTD with other protocols due to differences in payload and priority.
Applications of RTD
RTD is used to evaluate network performance, diagnose connectivity issues, and optimize data transmission efficiency.
RTD vs. End-to-End Delay
End-to-end delay is the time it takes for a signal to travel in one direction and is often approximated as half the RTD.
