sending multiple files over the network

I want to send the multiple files over the network, i am having one window
services that services keep on listening the one port and accept the
request(multiple client can send the request) that request in the form of
requesting some image file

the requested files may be more than 2000 image files.

i want to know how to implement this concept

can we use multiple port to send the file or else one port?


If i send the files in multiple port

a) if the server send the multiple files over the multiple port how the
client system should be act?


b) if the server send the multiple files over the multiple port can we
implement the thread concept for sending the file in each port, if it is, how
to implement the thread concept in client system and how to retrieve the
each files and stored in client machine


Thanks in advance!

Renganathan