ITPEC FE Subject A April 2026 Question 26
ITPEC FE Subject A April 2026 — Question 26 of 60
DNS associates domain or host names with IP addresses.
It is the distributed directory of the Internet: a resolver asks for www.example.com and receives the IP address the packets must actually be sent to, so people can use names while the network uses numbers.
Answer (b)
Why not others:
- (a) — describes DHCP, which leases addresses from a pool to devices as they join
- (c) — describes NAT, translating private addresses into a global one
- (d) — describes a naming or directory service used by remote procedure calls, which resolves program names; DNS resolves host names
Key rule: DNS answers "which address belongs to this name". DHCP hands out addresses, NAT rewrites them — three different jobs that all involve IP addresses.
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