1.2. Differentiate Between Bandwidth and Throughput. 100-150 Practice Questions (Page 5)

Questions 21–25

1. 21foundation · easy

   Which statement correctly distinguishes bandwidth from throughput?

   • ABandwidth is the actual measured data rate, while throughput is the theoretical maximum data rate.
   • BBandwidth is the theoretical maximum data rate, while throughput is the actual measured data rate.
   • CBandwidth and throughput are the same and can be used interchangeably.
   • DBandwidth is measured in milliseconds, while throughput is measured in bits per second.
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2. 22application · medium

   A network administrator is troubleshooting a slow file transfer between two servers on a 1 Gbps Ethernet link. The transfer of a 500 MB file took 8 seconds. The administrator checks the link and confirms it is operating at 1 Gbps with no errors. What is the most accurate explanation for the observed transfer rate?

   • AThe throughput is about 500 Mbps, which is lower than the 1 Gbps bandwidth due to protocol overhead and other factors.
   • BThe throughput is 1 Gbps, and the 8-second transfer time is due to high latency between the servers.
   • CThe bandwidth is 500 Mbps, and the throughput is 1 Gbps, so the link is performing above its rated capacity.
   • DThe bandwidth is 500 Mbps, and the throughput is 1 Gbps, so the link is performing above its rated capacity.
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4. 23foundation · easy

   A network link has a bandwidth of 100 Mbps. A file transfer achieves a data rate of 80 Mbps. What does the 80 Mbps represent?

   • AThe latency of the link
   • BThe bandwidth of the link
   • CThe throughput of the transfer
   • DThe protocol overhead
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5. 24expert · hard

   A network engineer is troubleshooting a 1 Gbps WAN link that is performing poorly. An Iperf test between two hosts on opposite ends of the link shows only 200 Mbps throughput, but the link's bandwidth is confirmed to be 1 Gbps. The engineer suspects that the issue is not congestion. Which additional test would best help confirm the root cause?

   • AMeasure the round-trip time (RTT) between the two hosts
   • BRun an internet speed test from one host
   • CCheck the CPU utilization of the hosts
   • DIncrease the Iperf test duration to get a more accurate result
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6. 25expert · hard

   A company has a 500 Mbps internet plan. An employee runs a speed test and gets 480 Mbps download. Later, the employee downloads a file from a remote server and gets only 30 Mbps. The IT team verifies the remote server is not overloaded. What is the most likely reason for the discrepancy?

   • AThe file download is limited by the employee's computer, not the network.
   • BThe speed test measures bandwidth, while the file download measures throughput, so the values are not comparable.
   • CThe speed test server is closer and less congested, while the remote server's path has higher latency and more hops, reducing throughput.
   • DThe remote server is using UDP, which is slower than TCP for large transfers.
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