tutes-dump/site-tutorials/FAQ/MDNS/01

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[01] WHAT IS A DOMAIN NAME SYSTEM (DNS)?
Domain Name System (DNS) is the registration of a domain namespace
with a TOP-LEVEL (root) domain name servers on the internet.
There seems to quite a misunderstanding among internet newbies regarding
what DNS is .. to make it clear, here is a short list of what DNS is
and isn't.
A DNS record lists:
* The IP addresses for the domain and hosts associated with the domain.
* The aliases associated with the domain.
* The mail exchanger servers responsible for the domain.
A DNS record is NOT:
* webservice
* mail service
* ftp, telnet, finger .. et cetera
In short DNS basically is a DOCUMENT which states where services can
be found, but no services (other than the information) is provided.