An Internet domain name and its associated ip address can only handle
a finite amount of traffic per second.
Imagine the 405 freeway with 1 exit and everyone wants to use it.
Well you can only exit 1 lane at a time.
What are you gonna do.
Same thing the ip address is the exit.
only so many people per second can connect.
what they really need to do is have 1 page with 50 links on it.
this page could be served to that many folks.
the 50 links would be to: NY.healthcare.gov, fl.healthcare.gov, ca.healthcare.gov.
All different ip addresses on different servers.
it would be like 50 de3dicated on ramps instead of the one.
ONE SERVER COULD PROBABLY NEVER DO IT FOR A COMPLEX SITE WITH THAT MUCH TRAFFIC.
That would probably do it. but there could be a few links per state if necessary.