Domain Name System?
DNS -
Domain Name System DNS - , web- . IP-, 111.222.111.222, , merionet.ru. , IP-. DNS. , IP-.
DNS . root, (.) (Top Level Domain). :
- Generic Top Level Domain (gTLD)
- Country Code Top Level Domain (ccTLD)
: .com ( web-), .net(web- ), .org (- ), .edu (web- )
: .ru (), .us (), .uk (), .in ()
, -, DNS Zone Files. . DNS- , . , address mapping (A) host name IP-, reverse-lookup pointer (PTR), IP- host name. , DNS , :
- A Record - IP-. DNS- , , . IP-, .
- PTR Record - IP- .
- NS (Name Server) Record - DNS-, .
- MX (Mail Exchange) Record - . , example@merionet.ru, , MX .
DNS
DNS :
- Recursive : IP- a.merionet.ru?
- DNS- IP- a.merionet.ru?
- DNS- a.merionet.ru .
- DNS- IP- a.merionet.ru root-
- Root- , TLD , .ru
- DNS-, root-, recursive ccTLD-, .ru
- TLD- , , merionet.ru
- DNS- IP- a.merionet.ru , merionet.ru
- A Record IP- a.merionet.ru
- , a.merionet.ru
- DNS- Iterative . DNS-, . , ,
- Inverse. , , IP- .
recursive , DNS- :