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A server (computer) that sits between a client application, such as a Web browser, and a real server (AOL or an ISP).

It intercepts all requests to the real server to see if it can fulfill the requests itself. If not, it forwards the request to the real server.

Using a proxy server, a company can stop employees from accessing undesirable Web addresses and it can also improve performance by storing locally Web pages that any one individual visits. When another individual at the company tries to go to that same web page, the proxy server can deliver the copy that it has stored.

A proxy server can also hide the internal network's identity. This makes the company's computers less vulnerable to attacks from the outside.

Lastly, a proxy server can keep out all visitors that don't have specific permission or authorization to vist the company's network of computers.

Q. "I wonder what the average intelligence level of your readers is. Here's a test that you can pass on to them."

A. Thanks to "Tom" for passing on to us this intelligence quiz. You may take the quiz by clicking on the following link...

Until next week, this is your computer guy, changing the world one computer user at a time.

P.S. - Guess whose birthday is on Wednesday, July 25th? Let's see who comes up with the best Internet Birthday Card for me. Just send it to...

P.P.S. - Wanna hear the famous birthday greeting that Marilyn Monroe sang to John F. Kennedy? Just right-click on the following link and save the mp3 file to your hard drive (choose "save link as"). It's about 400k in size.

Copy-protected CDs quietly slip into stores
"The technology, which inserts audible clicks and pops into music files that are copied from a CD onto a PC, highlights what could become a critical part of the major music labels' efforts to stem digital piracy."

Reach Out and Buy Something?
"PocketNet customers can now purchase from nearly all of Amazon's stores, including books, music, video, DVD, electronics, kitchen and housewares and outdoor living."

Napster gets go-ahead to resume service
"But the three-judge panel's decision still requires Napster to remove copyright works that both that the court has found were violating copyright laws."

Web Makes Court Records Open
"Once the only way to get such information was to go to the courthouse and request it. But more courts around the nation are making such records available to anyone with Internet access."

Napster's old users are gravitating to other services like Music City and Aimster and KaZaA that allow users to freely trade music. The reason these services can exist while Napster appears headed for the scrap heap comes down to how each service allows users to trade files. Instead of a central index like Napster many of these other services use a "peer to peer" (computer to computer) system to locate files.

Napster creates a virtual card catalog of music comprised of the songs taken from people who have signed on to the service. Napster users search for a song -– say "My Way" by Frank Sinatra. Napster's search engine would then provide a list of users who have that song on their PC and with one click of a mouse, that song could be copied and downloaded from hard drive to hard drive.

These other services resemble a teenager's bedroom floor. Instead of a card catalog, information is strewn across the network in no particular order. So if a user wanted to find "My Way," the search engine would have to go from computer to computer, looking for the song.

It takes a little longer than flipping through a card catalog, but it's also hard to shut down.

Napster's card catalog system is an easy target for copyright infringement suits since it is well ordered and sitting in one place. Copyright owners just search the system to find out if there are any violations. However, to stop such services as BearShare (a popular peer to peer file sharing community) "bedroom system", the RIAA (recording industry) would have to identify and sue each individual user since there isn't one place -– one card catalog –- that can be shut down.

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