令和3年度 ITパスポート試験問5

This question's explanation and your answers so far.

問5

頻出度★☆☆

クラウドコンピューティングの説明として, 最も適切なものはどれか。

出典　令和3年度 ITパスポート試験問5

解説

問 5

Incorrectア
This describes “centralized processing,” in which data is concentrated on a computer such as a mainframe (a large general-purpose computer) and processed in one place; it differs from cloud computing, which uses resources on demand via a network.
Incorrectイ
This describes “EUC (end-user computing),” in which users outside the information systems department operate computers themselves to make use of them for their own or their department's work; it is not a description of cloud computing.
ウ
正解 Cloud computing refers to a service model in which various IT resources such as software, hardware, and storage are not owned or built by oneself, but are used via networks such as the internet — only in the amount needed when needed (on demand), flexibly scaling up or down according to load (scalably). Choice ウ describes the core characteristics of the cloud — “via a network,” “on demand,” and “scalable” — completely and without excess, making it the most appropriate.
Incorrectエ
This describes “distributed processing (such as grid computing),” in which processing is distributed across multiple computers via a network and the results are shared; it differs from the essence of cloud computing, which uses resources on demand and scalably.

ここがポイント

Definition of cloud computing: a service model that uses various IT resources on demand and scalably via a network.
Distinguishing confusable concepts: grasp how it differs from centralized processing (ア), EUC (イ), and distributed processing (エ).

用語

解答問5ウ