Differences between version 7 and revision by previous author of DNS.
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| Newer page: | version 7 | Last edited on Tuesday, September 30, 2003 6:42:53 pm | by JohnMcPherson | Revert |
| Older page: | version 6 | Last edited on Monday, August 25, 2003 11:50:27 am | by CraigBox | Revert |
@@ -1,10 +1,19 @@
An [Acronym] for __D__omain __N__ame __S__ervice -- the glue that binds the InterWeb together.
-DNS is the [Protocol|CategoryProtocols] that takes you typing 'www.JRandomWebsite.com' into your web browser, finds the InternetProtocol address of the site (which would look something like 127
.1
).
+DNS is the [Protocol|CategoryProtocols] that takes you typing 'www.JRandomWebsite.com' into your web browser, finds the InternetProtocol address of the site (which would look something like 64
.94
.110
.11
).
Practical upshot? You can remember www.amd.com instead of 64.41.192.105. And then they can change the name to point somewhere else if they need to (if something like the CodeRedBungle happens).
DNS is usually provided by a program called named(8) - usually a version of bind, the Berkeley Internet Name Daemon. See our NamedNotes page and our NameServer page for some definitions. We also have a [DNSHowTo].
RFC:1034 - Domain Names - Concepts and Facilities
RFC:1035 - Domain Names - Implementations and Specification
+
+DNS doesn't "just" turn names into numbers (a ForwardLookup) - there are different types of records:
+* [A] and [AAAA] and [A6]
+* [CNAME]
+* [LOC] (to find the [GPS] location of a machine or site)
+* [MX] (to find an [SMTP] server for a domain)
+* [NS] (to find a NameServer for domain)
+* [PTR] (for doing a ReverseLookup)
+* [TXT]
