問64
頻出度★★★
インターネットでURLが “http://srv01.ipa.go.jp/abc.html” のWebページにアクセスするとき，このURL中の“srv01”は何を表しているか。
平成30年度 春期 ITパスポート試験 問64
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 64
Incorrectア
srv01 indicates a host name; it does not indicate whether ipa.go.jp is a web service. Moreover, what indicates that “the communication is web (HTTP)” is the http:// part at the start of the URL, not the host name part. Incorrect.
Incorrectイ
The file name of the web page being requested corresponds to the path part “/abc.html” at the end of the URL. srv01 is the name of the computer being connected to, not a file name, so it is incorrect.
Incorrectウ
Specifying HTTP or HTTPS as the communication protocol (scheme) is done by the “http://” part at the start of the URL. srv01 is a host name that has nothing to do with specifying the protocol, so it is incorrect.
- エ
正解 A URL has the structure “scheme://host name.domain name/path and file name”. In the question’s “http://srv01.ipa.go.jp/abc.html”, the leading http is the communication protocol, the following “srv01.ipa.go.jp” is the name that uniquely identifies the computer being connected to (an FQDN), and the trailing /abc.html indicates the file to be retrieved. Within this “srv01.ipa.go.jp”, the latter part “ipa.go.jp” is the domain name representing the organization, and the leading “srv01” is the host name that identifies an individual computer (such as a web server) belonging to that domain. Therefore, choice エ, which states that srv01 is “the host name of a computer or similar that belongs to the domain name ipa.go.jp”, is correct.
ここがポイント
- URL structure: “scheme (http/https)://host name.domain name/path and file name”, where each part plays a role in indicating the connection target or the resource to be retrieved.
- In an FQDN, the leading label is the host name pointing to an individual computer, and the remaining part is the domain name representing the organization.
用語