What are DNSSEC, DoH, and DoT?

• A. Advanced DNS features that enhance security and privacy
• B. Protocols for time synchronization
• C. Encryption standards for SIP
• D. Methods for dynamic IP allocation

Answer: (A)

DNSSEC, DoH, and DoT focus on making the Domain Name System more trustworthy and private. DNSSEC adds digital signatures to DNS records so resolvers can verify that a response truly comes from the authentic source and hasn’t been tampered with, protecting against cache poisoning and data integrity issues. DoH and DoT address the privacy and confidentiality of DNS queries themselves: DoH sends DNS queries over HTTPS, encrypting them within regular web traffic, while DoT uses TLS to encrypt DNS queries directly on a dedicated TLS channel. These ideas are not about time synchronization (that’s NTP/PTP), SIP encryption standards, or dynamic IP allocation (DHCP). In short, they are advanced DNS features that enhance security and privacy.