What is the primary purpose of the DNS protocol?

What is the primary purpose of the DNS protocol?

• A. To resolve domain names to IP addresses
• B. To transfer files between hosts
• C. To provide email routing
• D. To encrypt traffic

Answer: (A)

The essential function of the DNS protocol is to translate human-friendly domain names into numeric IP addresses that computers use to locate each other on the network. When you type a domain, your device asks a DNS resolver to find the corresponding IP address; the resolver may query multiple servers and use cached results before delivering the address so the client can establish a connection to the right server. This name-to-address resolution underpins web browsing, email delivery, and other Internet services because applications need a numeric address to reach the correct host by its name. DNS also provides information about resources through various records (like A/AAAA for addresses or MX for mail routing), but the primary purpose remains resolving names to addresses. Transferring files between hosts is handled by dedicated file-transfer protocols, not DNS. Encrypting traffic is achieved by other protocols such as TLS, not by DNS itself (though some extensions aim to improve security or privacy in DNS, the core role is still name resolution).

The essential function of the DNS protocol is to translate human-friendly domain names into numeric IP addresses that computers use to locate each other on the network. When you type a domain, your device asks a DNS resolver to find the corresponding IP address; the resolver may query multiple servers and use cached results before delivering the address so the client can establish a connection to the right server. This name-to-address resolution underpins web browsing, email delivery, and other Internet services because applications need a numeric address to reach the correct host by its name.

DNS also provides information about resources through various records (like A/AAAA for addresses or MX for mail routing), but the primary purpose remains resolving names to addresses. Transferring files between hosts is handled by dedicated file-transfer protocols, not DNS. Encrypting traffic is achieved by other protocols such as TLS, not by DNS itself (though some extensions aim to improve security or privacy in DNS, the core role is still name resolution).