QUESTION:
I read that 100 million people have logged in to the Mars web page. My
question is: what kind of server do you have? How do you manage so many
requests?

ANSWER from Marc Siegel on July 21, 1997:
Though I am not the Mars Pathfinder webmaster (that honor goes to David
Dubov), I do know how they managed to handle 100's of millions of hits. 
Long before July 4th, David and his web team at JPL arranged for a bunch of
mirror sites to handle the web traffic. Currently there are over 20 sites
around the world which are dishing up the identical material that is served
from the JPL site. This way, not any one place has to handle all of the
traffic. For a list of all of the sites, visit http://mars.sgi.com

From my perspective, this has worked very well.  Every time I have gone to
get Pathfinder data, I have been successful.

Thanks for your interest, Marc