There are so many cool things about DNS one drawing is not going to do it justice. Please let this drawing serve as an inspiration to learn more about DNS. DNS is awesome because it allows you to have a full blown CDN for next to nothing. All you have to do is create a CNAME that points to Amazon S3.
SlashDot is running a story saying that the twice a day DNS updates of .com and .net domains will cease to exist; VeriSign Naming and Directory Services will be switching to a near real-time system on September 8, 2004. From the announcement: After the rapid DNS update is implemented, the elapsed time from registrars’ add or change operations to the visibility of those adds or changes in all 13 .com/.net authoritative name servers is expected to average less than five minutes....