how to test an internet application?
 

it would require several computers maybe, but more than one definitely....
I installed virtual PC, but apparently I would have to install OS too, and I dont have CD for that at the moment...
what other way? i basically want different ip addrs

Download a linux distro image and just use that instead of burning it to a disc.

You could be a lazy bastard and grab a second ethernet card, and a foot of cat-5 UTP cable (wired as crossover). Saves having to do any real work. :)

the internet application is supposed to run on windows

Send it to some one and have them connect to you??

Why don't you just run multiple instances of your program on one computer...?

they all will have same ip address then?!

i mean if you know a way around that, then do let me know

yeah but that will be just a couple of comps...
hmmm

Yes. Yes they will. Your server will bind to a certain port, such as 1234. Your client simply binds to a random available port. You will direct your client to connect to localhost (or 127.0.0.1) on port 1234.

The only time I have ever needed multiple machines for simple tests has been when writing a NAT holepunching library. If you're asking, then you have no such need.

umm I didnt want all of them to have the same ip addr, because my server code distinguishes between two connections using ip addr (well, sort of)