Which App Response Time metric measures the amount of time it takes to transfer incoming data from an external server to a local client?

Question

Options

• AUDP Response Time (UDP-TRT)
• BServer Response Time (SRT)
• CNetwork Transfer Time (NTTn)
• DRound Trip Time (RTT)

• A
  4% (1)
• B
  7% (2)
• C
  4% (1)
• D
  85% (23)

Explanation

Round Trip Time (RTT) captures the full cycle of a client request traveling to an external server and the resulting data transferring back to the local client - making it the metric that directly measures incoming data transfer time from server to client.

Why the distractors are wrong:

• A (UDP-TRT) measures total response time specifically for UDP-based transactions, not the data transfer leg itself.
• B (SRT) measures only the time the server spends processing a request before it begins sending data back - it stops where the transfer starts.
• C (NTTn) measures network-level transfer time for individual TCP segments in a transaction, not the complete incoming data transfer from server to client.

Memory tip: Think of RTT as the "there and back" metric - the request goes out to the server, and the data comes back to you. The "transfer incoming data" in the question is the return leg of that round trip, which RTT captures as a complete measure of the client's full experience.

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