問55
頻出度★★★
インターネットに接続されているサーバ上のディスクスペースを, ファイル保管用に貸し出すサービスであり, 自宅や外出先などから利用者がデータを読み書きできるものはどれか。
平成23年度 秋期 ITパスポート試験 問55
テクノロジ系ネットワーク › ネットワーク応用
This question's explanation and your answers so far.
解説
問 55
Incorrectア
Archive is incorrect. An archive means combining several files into a single file, or moving data that is used less often to another medium for long-term preservation, as well as the data kept in that way itself. It always refers to the act of combining or preserving, or to the result of that act; it is not the name of a service that lends out disk space on the Internet to users. Files that have been archived can be placed on online storage, but the two are different concepts.
Incorrectイ
Authoring is incorrect. Authoring is the production work of combining materials such as text, still images, audio, and video, specifying the playback order and screen transitions, and building them into a single piece of multimedia content or electronic teaching material. Software that supports this work is called an authoring tool (authoring software). It is a term on the side of creating content and has nothing at all to do with a mechanism for entrusting and keeping files, so it matches none of the conditions in the question.
- ウ
正解 The correct answer is ウ, online storage. Online storage is a service in which a provider lends out disk space on a server placed on the Internet to users as a place to keep their files. A user accesses that space over the Internet from a personal computer or smartphone and uploads (writes) or downloads (reads) files. Because the data is kept not on the device at hand but on a server on the other side of the Internet, the same file can be accessed in the same way from different devices such as a home PC, an office PC, or a laptop or smartphone while out. This is the only term that satisfies, no more and no less, the three conditions given in the question: (1) it is disk space on a server connected to the Internet, (2) it is a service that lends that space out for file storage, and (3) users can read and write from home, while out, or anywhere else. It is a kind of cloud service, and it can also be used so that several people share the same space for collaborative work, or as a place to keep backups in case equipment fails. On the other hand, since this form entrusts data to a party outside the company, users on their side are also required to take measures against information leakage, such as managing IDs and passwords properly and encrypting communications.
Incorrectエ
Flash memory is incorrect. Flash memory is non-volatile semiconductor memory whose stored contents are not lost even when the power is turned off, and it is used in USB memory sticks, SD memory cards, SSDs, and so on. It is the same in that it can store data, but it is a physical storage medium that the user keeps and carries at hand; it is neither a server connected to the Internet nor a service that lends out disk space. Unless you carry the medium with you, you cannot read or write from another place, so it does not fit the description of a service in which, as the question puts it, users can read and write data from home, while out, and other locations.
ここがポイント
- Online storage is a cloud service that lends out disk space on a server on the Internet for keeping files. With any device that can connect to the network, you can read and write the same file from home, from the workplace, or while out, and it is also used for sharing among several people and as a destination for backups. Conversely, because the data is entrusted outside the company, measures against information leakage such as managing IDs and passwords and encrypting communications are indispensable.
- Tell confusing katakana terms apart by what each one does: an archive is combining several files into one or moving data away for long-term preservation, authoring is producing multimedia content, and flash memory is non-volatile semiconductor memory whose contents are not lost when the power is turned off (a physical medium). The key to this question is not to pick a word for an action or the name of a physical medium when the question asks about a service.
用語