X clients are merely programs that run on X. There is no actual program called X Client.
The X SERVER is the foundation for building graphical user interfaces on most UNIX systems, it is the interface between the user, user interface, and display drivers. Things like KDE and GNOME run on top of the X server.
But anything you run on X is an X client: Firefox, openbox, kopete, KDE, VLC, mplayer, you name it.
You don't. You can use a general-purpose Jabber client like Psi or Pigdin to communicate using GTalk.
The X Windowing System is the "de facto" standard for graphical shells in Unix and Linux. Desktops use it as a client as well as all the graphical applications.
Multimedia has the same purpose in Linux as it does in Windows or Mac OS X. Multimedia is commonly used for entertainment, but also for educational / instructional purposes.
dhcp-client
red hat enterprise Linux is used as a server while red hat Linux is used as client..
Ubuntu is a Linux distribution (as in a specific OS setup with the Linux kernel.)
On Windows, the best client is probably Pidgin. On Linux, Kopete is actually slightly better than Pidgin. iChat (included with OS X) and Adium are both popular chat clients with Jabber / XMPP support for Mac OS X.
This isn't really a module. In Linux a module is something you load into the kernel or into an application to extend their capabilities. The X client that displays a user list for login purposes is called a "display manager."
True
Yes, the Tixati BitTorrent client is a good and safe client. It runs on both Linux and Windows.
Yes, as long as they have user accounts on both machines.
purpose for an initial contact with a client regarding a project