1.2. Differentiate Between Bandwidth and Throughput. 100-150 Practice Questions (Page 7)

Questions 31–35

1. 31expert · hard

   A company is choosing between two internet plans for a branch office. Plan A offers 1 Gbps bandwidth with a 50 ms RTT. Plan B offers 500 Mbps bandwidth with a 10 ms RTT. The office primarily uses cloud-based applications that require both large downloads and real-time collaboration. Which plan is likely to provide a better overall experience?

   • APlan A, because bandwidth is the only factor that matters for cloud applications
   • BPlan B, because the lower latency improves real-time collaboration, and 500 Mbps is sufficient for most downloads
   • CPlan A, because the higher bandwidth ensures faster downloads
   • DPlan B, because lower latency always results in higher throughput
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2. 32application · medium

   A network administrator notices that a 1 Gbps link between two switches is only achieving 600 Mbps throughput during peak hours. The link is not saturated, and there are no errors. What is the most likely cause of the reduced throughput?

   • ALatency is high, which directly reduces throughput.
   • BThe link is operating in half-duplex mode, which halves the throughput.
   • CThe bandwidth of the link is actually 600 Mbps, not 1 Gbps.
   • DNetwork congestion from other traffic on the path is reducing the available throughput.
   Reveal Solution Discussion Select an answer first
4. 33expert · hard

   A network engineer is comparing the performance of two data center links. Link A has a bandwidth of 10 Gbps and an RTT of 1 ms. Link B has a bandwidth of 1 Gbps and an RTT of 0.1 ms. The engineer needs to transfer a 10 GB file using TCP. Which link will likely complete the transfer faster?

   • ALink A, because the higher bandwidth always results in faster transfers
   • BBoth links will complete the transfer in the same time
   • CLink A, because the higher bandwidth compensates for the higher RTT
   • DLink B, because the lower RTT allows TCP to use the available bandwidth more effectively
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5. 34expert · hard

   A company is deploying a VoIP system. The network has a 1 Gbps LAN and a 100 Mbps internet connection. The VoIP traffic is sensitive to delay and jitter. The IT team measures a one-way latency of 80 ms between the office and the VoIP provider. The call quality is poor. What is the most likely cause?

   • AThe internet bandwidth is too low for VoIP traffic.
   • BThe latency is too high for VoIP, causing noticeable delay and poor call quality.
   • CThe LAN bandwidth is too low for VoIP traffic.
   • DThe throughput is too low because of protocol overhead.
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6. 35application · medium

   A network administrator wants to measure the maximum throughput between two servers on different floors of the same building, bypassing the internet. The administrator has installed Iperf on both servers. What is the correct next step?

   • ARun an internet speed test on both servers and compare the results.
   • BRun Iperf in server mode on both hosts to measure the throughput between them.
   • CUse ping with a large packet size to measure throughput.
   • DStart the Iperf server on one host and run the Iperf client on the other host, specifying the server's IP address.
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