Which statement is NOT a function of DNS?

Which statement is NOT a function of DNS?

• A. Translates domain names to IP addresses.
• B. Encrypts web traffic at the transport layer.
• C. Caches DNS lookups for faster resolution.
• D. Provides information for domain name resolution.

Answer: (B)

DNS focuses on naming and resolution: it translates human-friendly domain names into the IP addresses computers use to reach servers, it caches those results to speed up repeated lookups, and it provides the information (records and delegation) needed to resolve a domain. Encrypting web traffic at the transport layer is not a function of DNS; that encryption happens with protocols like TLS (used by HTTPS), which secures the data as it travels between client and server. There are ways to encrypt DNS queries themselves (DNS over TLS/DoH), but DNS itself does not encrypt the actual web traffic it helps direct.

DNS focuses on naming and resolution: it translates human-friendly domain names into the IP addresses computers use to reach servers, it caches those results to speed up repeated lookups, and it provides the information (records and delegation) needed to resolve a domain. Encrypting web traffic at the transport layer is not a function of DNS; that encryption happens with protocols like TLS (used by HTTPS), which secures the data as it travels between client and server. There are ways to encrypt DNS queries themselves (DNS over TLS/DoH), but DNS itself does not encrypt the actual web traffic it helps direct.