Is it possible to built a LAN where a PC will work as a server and its OS will be LINUX (Fedora)
Yes, you can have a Fedora/Linux PC perform server functions for windows clients when all of the computers are on the same LAN
whereas other PCs having Windows XP Professional as OS and will work as the terminals of the server.
What type of terminal?
1) Text-based (shell), yes.
2) Graphical-based, yes.
3) Full thin-client (
http://en.wikipedia.org/wiki/Thin_client) - that's a bit more tricky but possible with the right hardware.
The server will be accessed by the terminals through a web browser.
Depends on what you want to access via the web browser. Most likely - you only want to access web sites, but there are some applications that allow you to manage your sever though the browser (webmin). If you want to access a graphical interface through a browser - the only option I know of is like a VNC applet within a browser window (It is just easier to run with the stand alone VNC client).
The term "server" it is really a vague reference. A server is really a service that runs on a computer - a "server service". These services can be a lot of different things (Web Server {apache/httpd}, File Server {samba}, FTP Server {vsftpd or pureftpd}, DNS Server {bind}, DHCP Server, etc.)
If you're looking for a desktop-like environment, you may check out VNC or NX (
http://en.wikipedia.org/wiki/NX_technology), which are both a lot like Windows Remote Desktop.
Keep in mind that everything has their own benefits and limitations.
