@meanman - chill out and stop taking advantage of someone else's lack of knowledge in a certain area.
@brycematheson712 - Ok, servers, asking about "them" is like asking about "pc's" n general so nothing really specific or helpful can really be posted.
In essence they arejsut PC's, just a bit more centered on how fast they can turn around a request for data to them actually passing the data back out.
There are lots of types of servers aswell, which is why you cant just say "talk about servers"...
File servers are literally just a normal PC with file management software plonked on top, usually with some sort of user permissions hierarchy to authenticate users to their own files.
Web Servers are a bit different, tailored ONLY for web access, every website will be running off of at least one web server, these will have web server software installed onto them, a common one would be "Apache", stability is key here, as it is not really a PC that you want to have rebooting every 10 minutes, no PC = no website... Linux or another unix core is usually opted for as it provides alot more stability than windows can offer, although for the higher end users Windows Server 2003 is used as it's feature set and capabilities far outweigh that of an open source unix core.
Media Servers aren't really used in a commercial environment, it's sort of a thing techie geeks will have set up at home, it's a normal PC with media streaming software installed, media files like videos, DVD's or audio files are queued on demand using a terminal (elsewhere in the house) and are streamed from the media server. To make life simple and to add to the bragging or boasting factor these are usually wireless.
Now for some general networking and server info:
> Web servers run on port 80
> FTP servers run on port 21
> General cabled networking speeds are either 10Mbps or 100Mbps, with newer hardware supporting up to 1Gbps (1000Mbps)
> Wireless is currently at 54Mbps but people like Netgear have started to adopt 108Mbps wireless cards a while back (as well as routers). Wireless-N is still in development and only a handfull of products have been released for sale running at 240Mbps (wireless)
> Any PC can be a server of any type, as long as it has the right software soo it can respond to any requests it gets in the correct manor and on the right port as well
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So that's just 10mins of me writing whatever came to my head, it all depends on what you want to learn about, maybe you should isolate maybe one or two things you really want to go into detail about and we can expand from there
dragon2309
*EDIT* - oh and yes, of course game servers, and all the info meanman posted goes with it, but obviously, thats very niche aimed, and not exactly what a normal person would look to learn about when speaking about servers. Also, you wouldn't need to type all of that out, that is the debug info for a console version, most games now-a-days are controlled by a nice GUI, so what meanman posted is almost redundant.