What does DNS stand for?
AnswerDomain Name System
DNS is the internet's naming system that links domain names to addresses.
Tech · Facts & stats
Domain facts & stats
7 fact-checked facts about internet domain names, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
In "example.com", what is the ".com" part called?
AnswerTop-level domain
The top-level domain, or TLD, is the last label in a domain name.
Going deeper
What is the main job of DNS?
AnswerTranslating domain names into IP addresses
DNS lets people type names while computers connect using numeric IP addresses.
The domain ending ".tv" is the country code for which nation?
AnswerTuvalu
.tv belongs to Tuvalu, a Pacific island nation; Tonga uses .to.
Which port number does DNS commonly use?
Answer53
DNS queries usually use port 53; 80 and 443 are for web traffic and 25 for mail.
Expert level
How many named root server identities, lettered A through M, does DNS have?
Answer13
There are 13 root server identities, each run on many machines around the world.
Which DNS record type maps a name to an IPv6 address?
AnswerAAAA
AAAA records hold 128-bit IPv6 addresses, four times the size of IPv4's 32 bits.
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