IPA IP 2021 Question 98
A question IPA Japan published in 令和3年度 ITパスポート試験 公開問題 問98, translated into English. ITPEC is based on the same exams.
Which of the following is an appropriate description concerning domain names used on the Internet?
Explanation
A readable name for a connection destination, used in place of an IP address — computers find each other by IP addresses, and a domain name gives that address a name people can remember.
When a domain name such as itpec. is used, DNS translates it into the IP address before the connection is made. The same domain name serves the web and e-mail alike, and anyone, an individual as well as a company, can register one through a registrar.
Answer (d)
Why not others:
- •(a) — internationalized domain names allow characters other than letters, digits and hyphens, so Japanese domain names in kanji and hiragana (such as under
.jp) can be registered - •(b) — the part of an e-mail address after “@” is a domain name, so domain names are used in e-mail too
- •(c) — individuals can register domain names; only some types, such as
co.for companies, are limited to particular organizationsjp
Key rule: A domain name is a human-friendly name that DNS turns into an IP address; it is used in URLs and e-mail addresses alike.
Networks · AI-written, may contain errors
This question comes from the past questions IPA Japan publishes, translated into English by ITPEC Practice. ITPEC Practice is an independent study tool and is not affiliated with IPA or ITPEC. See the original paper (PDF) or Report an issue.