問81
頻出度★★☆
シンクライアントの特徴として, 適切なものはどれか。
平成22年度 秋期 ITパスポート試験 問81
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 81
- ア
正解 The correct answer is ア. A thin client is a setup in which the client terminal keeps only the minimum functions needed, such as displaying the screen and accepting keyboard and mouse input, while application execution and data storage are all handled on the server side. Because the terminal can be built without (or without using) auxiliary storage such as a hard disk, business data does not remain inside the terminal. As a result, the risk of information leakage from a lost or stolen notebook PC, or from data being taken out through the terminal, is greatly reduced. This property of leaving no data on the terminal is exactly the representative characteristic of a thin client, and it is the reason thin clients draw attention as a measure against information leakage.
Incorrectイ
Distributing data across multiple disks to raise availability describes RAID (Redundant Arrays of Inexpensive Disks). RAID combines several magnetic disks and uses mirroring or parity so that data is not lost and processing can continue even if one disk fails; it is a mechanism for raising the reliability and availability of storage devices. That is a different technology from the thin client idea of not placing data on the terminal.
Incorrectウ
A mechanism that lets a user access multiple services after being authenticated just once at the start describes single sign-on (SSO). It is an authentication mechanism that improves convenience by saving users from re-entering an ID and password for each service; it is not a characteristic of the thin client, which is a way of configuring terminals.
Incorrectエ
Performing authentication with a fingerprint or iris in addition to a password describes multi-factor authentication (used together with biometric authentication). It combines authentication by knowledge (a password) with authentication by physical characteristics (fingerprint or iris) to prevent impersonation and make identity verification more reliable; this too is about authentication methods, not a characteristic of the thin client.
ここがポイント
- Definition of a thin client: a setup in which the terminal keeps only minimal functions such as input and output, while application execution and data storage are concentrated on the server. Because no data remains on the terminal, it serves as a measure against information leakage, and software updates and settings can also be managed centrally on the server side. Its opposite is the fat client, which performs processing and data storage on the terminal itself.
- Telling confusable terms apart: raising availability by distributing data across multiple disks is RAID; being able to use multiple services after authenticating once is single sign-on (SSO); adding a fingerprint or iris to a password is multi-factor authentication (biometric authentication). Distinguish them by asking what purpose each technology serves and where it solves the problem.
用語