問74
頻出度★★★
URL に関する説明として, 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74
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 74
Incorrectア
The communication protocol (communication procedure) between a web page and a browser is HTTP (HyperText Transfer Protocol), or HTTPS when it is encrypted. The name of the protocol is indeed written at the beginning of a URL as a scheme, such as https:, but that is only the part that specifies “by which procedure the resource is fetched”; the URL itself is not a protocol but a rule for writing down a location. This choice confuses the two.
Incorrectイ
The mechanism that notifies users of the update history or new information of a web page is RSS (a feed). News sites and blogs distribute RSS, and users receive the updates together in an RSS reader. A URL has no function of notifying updates; it only points to the location of a resource.
Incorrectウ
The syntax for describing the content (body text) of a web page is HTML (HyperText Markup Language). It expresses the structure of a document by specifying headings, paragraphs, links, and so on with tags. A URL indicates the place where a file written in HTML is stored; it is not a language for describing the content.
- エ
正解 The correct answer is エ. A URL (Uniform Resource Locator) is a notation for uniquely writing down the “location” of a resource on the Internet. For example, in https://www.example.co.jp/info/index.html, the https part shows the communication procedure to be used (the scheme), www.example.co.jp is the name of the server that holds the resource (the host name), and /info/index.html is the position of the file inside that server (the path). This single string alone determines which server to go to, where in that server, and what to fetch, so typing a URL into the address bar of a browser or following a link on a page takes you to the intended web page. In other words, a URL is a notation used to indicate the location of a web page, so エ is appropriate.
ここがポイント
- URL stands for Uniform Resource Locator, a notation that indicates the location of a resource on the Internet. It generally takes the form “scheme (communication procedure)://host name (server name)/path (position within the server)”, and this single string is enough to reach the intended resource.
- Remember the basic web terms by distinguishing their roles: the URL indicates the location, HTTP / HTTPS is the communication procedure used to fetch it, HTML is the language that describes the content of a page, and RSS is the mechanism that distributes update information.
用語