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More on DNS
The Domain Name System (DNS) is a database of
computer names and IP addresses. This database
looks up a computer name (e.g., www.apple.com) and
translates it into an IP address (e.g.,
17.254.0.91), which is what computers actually use
to communicate with each other. Both
"www.apple.com" and 17.254.0.91 will work if you
type them in a web browser, but the name
"www.apple.com" is obviously easier to remember.
(For more on the theory behind the Domain Name
System, see the Appendix in the MacDNS manual.)
Depending on what services you will be using
with your AppleShare IP server, it may not be
necessary to give your server a DNS name. For
example, if you have an AppleTalk network are just
using TCP/IP to get more performance out of your
Chooser log-ins (or At Ease log-ins), then DNS is
not required. AppleShare takes care of switching
over to the proper IP address when you select the
server from the Chooser. For other services, such
as web and FTP, and mail, if you don't have DNS,
you will have to remember the IP address of the
server and type that in the web, FTP, or mail
client.
DNS becomes a requirement if you want your mail
server to send and receive mail to the entire
Internet. If your computer has a full connection to
the Internet, setting up DNS will require you to
coordinate with your ISP.
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