Which DNS concept maps a domain name to an IP address?

Which DNS concept maps a domain name to an IP address?

• A. MX record
• B. NS record
• C. PTR record
• D. A record

Answer: (D)

When a domain name is asked for, DNS needs to translate that name into a number the computer can use. The A record is the DNS entry that does this for IPv4 addresses: it links a domain name to its IPv4 address so web traffic can reach the correct server. For example, a domain like example.com has an A record that points to a specific IPv4 address, enabling your browser to connect. Other records serve different purposes: MX records indicate where to deliver email for the domain; NS records tell which servers are authoritative for the domain; PTR records provide reverse DNS, mapping an IP back to a domain name. Since this question is about linking a domain name to its numeric address used for web traffic, the A record is the right choice.

When a domain name is asked for, DNS needs to translate that name into a number the computer can use. The A record is the DNS entry that does this for IPv4 addresses: it links a domain name to its IPv4 address so web traffic can reach the correct server. For example, a domain like example.com has an A record that points to a specific IPv4 address, enabling your browser to connect.

Other records serve different purposes: MX records indicate where to deliver email for the domain; NS records tell which servers are authoritative for the domain; PTR records provide reverse DNS, mapping an IP back to a domain name. Since this question is about linking a domain name to its numeric address used for web traffic, the A record is the right choice.