100-150 Question 24
Single answerYou are troubleshooting a network performance issue for a client complaining about slow application responses. The client has conducted a speed test showing normal upload and download speeds. To further diagnose the issue, you decide to use Iperf. What can Iperf help you measure that a standard speed test may not?
- A
Latency and jitter between two endpoints
- B
The exact upload and download speeds of the network
- C
The maximum achievable throughput between two devices
- D
The packet loss percentage on a wireless network
Show answer and explanation
Correct answer: C
Explanation
Iperf is a tool specifically designed to measure the maximum achievable throughput between two endpoints under controlled conditions, which is useful for diagnosing network performance issues. While speed tests provide a general idea of upload and download speeds, they do not offer insights into throughput capacity between devices on the network or factors like jitter, which Iperf can measure.
- A. Incorrect.
Iperf is capable of measuring jitter (variation in latency) but not the actual end-to-end latency directly, which is not its primary focus.
- B. Incorrect.
Speed tests are better suited for measuring upload and download speeds provided by an internet service provider, not Iperf.
- C. Correct.
Iperf specializes in measuring the maximum achievable throughput between two endpoints, which is often used for diagnosing bandwidth issues in a controlled manner.
- D. Incorrect.
Iperf does not directly measure packet loss on a wireless network. While it can indicate issues through lower throughput, packet loss analysis requires other tools.