What does the acronym "DNS" stand for in networking?
2025
What does the acronym "DNS" stand for in networking?
- A.
Domain Name System
- B.
Digital Network Service
- C.
Dynamic Network System
- D.
Data Network Security
Attempted by 53 students.
Show answer & explanation
Correct answer: A
Answer: Domain Name System
Explanation: DNS translates human-readable domain names (for example, www.example.com) into IP addresses (for example, 93.184.216.34) so devices and services on the Internet can locate each other.
What it does: Provides a distributed, hierarchical directory that maps domain names to IP addresses and other records.
How a lookup works (brief): A resolver queries name servers which may return cached answers or forward queries until an authoritative answer is found.
Common record types: A (IPv4 address), AAAA (IPv6 address), CNAME (alias), MX (mail exchange), and TXT (text data).
Security note: DNS by itself maps names to addresses; security extensions such as DNSSEC add integrity and authenticity checks to DNS responses.