DNS over TLS uses which protocol to secure DNS resolution?

DNS over TLS uses which protocol to secure DNS resolution?

• A. TLS
• B. UDP
• C. HTTP
• D. SSH

Answer: (A)

DNS over TLS relies on TLS to secure the communication, wrapping DNS queries and responses in an encrypted, authenticated channel. This means the DNS resolution process benefits from confidentiality and integrity because the TLS handshake creates a secure session between the client and the DNS resolver (typically over TCP, often on port 853). It’s different from the traditional DNS transport, which uses UDP without encryption, and from DNS over HTTPS, which carries DNS data inside HTTPS. SSH isn’t involved in securing DNS in this approach.

DNS over TLS relies on TLS to secure the communication, wrapping DNS queries and responses in an encrypted, authenticated channel. This means the DNS resolution process benefits from confidentiality and integrity because the TLS handshake creates a secure session between the client and the DNS resolver (typically over TCP, often on port 853). It’s different from the traditional DNS transport, which uses UDP without encryption, and from DNS over HTTPS, which carries DNS data inside HTTPS. SSH isn’t involved in securing DNS in this approach.