IPA IP 2026 Question 65
A question IPA Japan published in 令和8年度 ITパスポート試験 公開問題 問65, translated into English. ITPEC is based on the same exams.
Which of the following is an appropriate description concerning the role of a DNS server?
Explanation
Converting domain names to IP addresses and back — a DNS server answers name-resolution queries.
Computers on the Internet reach each other by IP address, while people use domain names such as www.example.com. When a PC needs to reach a domain name, it asks a DNS server, which returns the matching IP address (forward lookup). A DNS server can also return the domain name for an IP address (reverse lookup).
Answer (d)
Why not others:
- •(a) — relaying requests to web servers and accessing them on the PCs' behalf is a proxy server
- •(b) — accepting requests to send and receive files and transferring them is a file transfer (FTP) server
- •(c) — assigning IP addresses automatically and notifying the subnet mask and default gateway is a DHCP server
Key rule: DNS: name to address; DHCP: hands out addresses and network settings; proxy: accesses servers on the clients' behalf; FTP: transfers files.
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.