Which statement about the DNS role is correct?

Which statement about the DNS role is correct?

• A. It translates domain names into IP addresses.
• B. It determines physical network topology
• C. It controls access to websites by IP
• D. It assigns DNS servers automatically to users

Answer: (A)

The main function of DNS is to translate human-friendly domain names into the IP addresses that computers use to locate services on networks. When you type a web address, your device asks a DNS resolver to find the corresponding numeric address. The resolver may query root servers, then top‑level domain servers, and finally the domain’s authoritative server to obtain the IP, which is then cached for faster future lookups. This name-to-address translation is what lets browsers reach the correct web server without you needing to remember numbers. DNS doesn’t determine physical network topology—that’s a job for routing and network design. It also doesn’t control whether a site is accessible by IP address, which would involve access controls or firewalls. And it isn’t responsible for automatically assigning DNS servers to users; that provisioning is typically handled by DHCP or manual configuration, not by DNS itself.

The main function of DNS is to translate human-friendly domain names into the IP addresses that computers use to locate services on networks. When you type a web address, your device asks a DNS resolver to find the corresponding numeric address. The resolver may query root servers, then top‑level domain servers, and finally the domain’s authoritative server to obtain the IP, which is then cached for faster future lookups. This name-to-address translation is what lets browsers reach the correct web server without you needing to remember numbers.

DNS doesn’t determine physical network topology—that’s a job for routing and network design. It also doesn’t control whether a site is accessible by IP address, which would involve access controls or firewalls. And it isn’t responsible for automatically assigning DNS servers to users; that provisioning is typically handled by DHCP or manual configuration, not by DNS itself.