ITPEC IP April 2025 Question 31
Which of the following is the appropriate role of a DNS in a network?
Explanation
It links domain names to IP addresses — DNS is the Internet's name-resolution service.
People use names such as www.example.com, but packets are routed by IP address. When a PC needs to reach a host by name, it asks a DNS server, which answers with the matching IP address (name resolution); the PC then connects to that address. DNS servers are organised in a hierarchy, each responsible for its own part of the domain name space.
Answer (c)
Why not others:
- •(a) — handing out unused IP addresses from a pool on request is DHCP
- •(b) — receiving and sending files for clients is an FTP server
- •(d) — passing received mail to the recipient on request is the job of a mail server using POP3 or IMAP
Key rule: DNS resolves names to addresses, DHCP assigns addresses to hosts, FTP transfers files, SMTP sends mail and POP3 or IMAP retrieves it.
Networks · AI-written, may contain errors
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