IPA IP 2023 Question 92

A question IPA Japan published in 令和5年度 ITパスポート試験公開問題問92, translated into English. ITPEC is based on the same exams.

Which of the following is an appropriate description concerning e-mail?

a)As the protocols for e-mail, SMTP is used for receiving, and POP3 is used for sending.b)When an e-mail sent through a mailing list is received, the e-mail addresses of all the registered members are written in its destination.c)E-mails are transferred on the basis of the domain name written in the part on the left side of “@” in the e-mail address.d)When a mail forwarding service is used, e-mails sent to multiple e-mail addresses in one’s own name can be saved in one (1) mailbox.

Explanation

A mail forwarding service can gather mail for several addresses into one mailbox — mail arriving at each address is automatically resent to one destination.

Someone who holds several addresses (one from work, one from a provider, a web mail one) can set forwarding on each of them to the same address. Mail sent to any of them then ends up in one mailbox, so there is only one place to check.

Answer (d)

Why not others:

•(a) — the other way round: SMTP is used for sending, and for relaying between mail servers; POP3 (or IMAP) is used for receiving mail from the server into the mail client
•(b) — mail to a mailing list is sent to the list's own address, and the list server redistributes it to the members; their addresses do not appear in the destination, which also keeps them private
•(c) — the domain name is the part on the right of “@” (example.com in user@example.com); it decides the destination mail server, while the left part names the mailbox on that server

Key rule: SMTP sends, POP3 and IMAP receive; in an address, the part after “@” routes the mail to a server and the part before it names the mailbox.

Networks · AI-written, may contain errors

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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.