Which of the following is a disadvantage of cloud computing?

Question

BlackTom AI · Accepted Answer

Cloud computing relies on remote servers and network connectivity, so performance and transfer speed are constrained by bandwidth and latency — this is the key concept underlying the correct choice.

1) Relevant knowledge points and concepts
- Cloud computing stores data and runs software on remote servers (IaaS/PaaS/SaaS) accessed over the internet.
- Advantages often include reduced local storage needs and easy backup/recovery.
- Disadvantages include dependence on internet connection, limited bandwidth, latency, and potential service outages.

2) Step-by-step reasoning
- Compare each option against the characteristics above.
- Option (a) "Less storage required in your device" is actually an advantage (not a disadvantage).
- Option (b) "Backup cannot be easily created and cannot be recovered from the cloud" contradicts one of cloud’s primary benefits: many cloud services provide automated backup and recovery.
- Option (c) "More hardware required to store data in our computer" is false; cloud reduces local hardware needs.
- Option (d) points to large files taking long to download and cloud-run software sometimes being slow — this directly follows from limited bandwidth and network latency.

3) Calculation example (demonstrating download time)
- Example: a 5 GB file = 5 × 8 = 40 gigabits. On a 10 Mbps connection:
  time = size / bandwidth = 40,000 Mb / 10 Mbps = 4,000 seconds ≈ 66.7 minutes.
- This shows large files can indeed take a long time to download on typical connections.

4) Why the correct answer is correct
- Because cloud access depends on network speed and latency, transferring large files or running interactive cloud-hosted applications can be slow or laggy, especially with limited bandwidth or high latency.

5) Why other options are incorrect (brief)
- (a) is an advantage, not a disadvantage.
- (b) is incorrect because cloud providers typically offer easy backup and recovery options.
- (c) is incorrect; fewer local hardware resources are usually needed with cloud storage.

6) Conclusion
- Therefore the correct disadvantage is option d: Large files can take time to download and running software from the cloud can be slow sometimes. This matches the provided answer.

Which of the following is a disadvantage of cloud computing?单项选择题

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