Which App Response Time metric is the measure of network latency?

Question

Options

• ARound Trip Time (RTT)
• BServer Response Time (SRT)
• CNetwork Transfer Time (NTTn)
• DUDP Response Time (UDP-TRT)

• A
  94% (33)
• B
  3% (1)
• C
  3% (1)

Explanation

Round Trip Time (RTT) measures the time it takes for a signal to travel from sender to receiver and back again - this is the classic definition of network latency, making A correct.

Why the distractors are wrong:

• B (Server Response Time) measures how long the server takes to process a request and begin sending a response - that's server performance, not network latency.
• C (Network Transfer Time) measures how long it takes to actually transfer data across the network (volume/bandwidth-dependent), not the latency of the path itself.
• D (UDP Response Time) is not a standard App Response Time metric; UDP is a transport protocol, and conflating it with a latency metric is a distractor.

Memory tip: Think of RTT like throwing a ball at a wall and timing until it bounces back - the "round trip" is the signal going to the destination and back, which is exactly what latency means. If you remember "round trip = there and back = latency," you'll never miss this one.

No community discussion yet for this question.