問86
頻出度★★☆
シンクライアント端末の説明として, 適切なものはどれか。
平成23年度 秋期 ITパスポート試験 問86
テクノロジ系システム構成要素 › システムの構成
This question's explanation and your answers so far.
解説
問 86
- ア
正解 The correct answer is ア. The “thin” in thin client means that the functions on the terminal side are thin, that is, kept to a minimum. Both the execution of application software and the management of resources such as files are performed entirely on the server side, and the terminal remains a device dedicated to the user interface, merely passing along screen output and keyboard/mouse input. This configuration brings two benefits: (1) no data is left on the terminal, so the risk of information leakage if it is lost or stolen is small; (2) software installation and updates can be carried out centrally on the server, which lowers the burden of operational management. Choice ア states exactly this definition — processing and resource management on the server, the terminal only for the user interface — so it is appropriate.
Incorrectイ
This describes a thin, compact PC equipped with a solid-state disk and low-power CPUs — that is, a mobile notebook PC (such as a netbook). The terminal itself runs applications and holds resources, so it is a fat client (thick client). The “thin” in thin client refers to thinness of function, not to the physical thinness of the chassis, so this statement mixes up the meaning of the word.
Incorrectウ
A terminal that is loaded with an application specialized for database search functions and used exclusively for a specific business task describes what is called a dedicated terminal (a business-specific terminal). The moment the application is installed on the terminal side, it differs from a thin client, which concentrates processing on the server. Whether or not the use is limited to a particular task has nothing to do with the definition of a thin client.
Incorrectエ
A terminal in which the information on the hard disk is automatically encrypted describes a security-oriented PC equipped with a disk encryption function. A thin client terminal originally prevents leakage by not storing data locally (it has no hard disk, or does not use one), so this statement, which presupposes that data is stored on a hard disk, does not match the definition. Even though the goal of preventing information leakage is similar, the means used is different.
ここがポイント
- Definition of a thin client: an approach that concentrates the execution of applications and the management of resources such as files on the server side, while the client terminal handles only the user interface (screen display and input). Because no data is left on the terminal, it works as a measure against information leakage, and software installation and updates can also be managed centrally on the server.
- Sorting out the contrasting terms: the traditional form, in which the terminal runs applications and holds resources itself, is a fat client (thick client). Distinguish that “thin” refers to thinness of function rather than thinness of the chassis, and that a thin client is a different concept from a business-specific dedicated terminal or a disk-encryption PC.
用語