A server is an application or device that performs service for connected clients as part of client server architecture. It can also be a computer system that has been designated for running a specific server application . A server can also serve applications to users on an intranet.
A workstation is a personal computer that is used for high end applications such as graphic design, video editing, CAD, 3-D design, or other CPU and RAM intensive programs. A workstation typically has a top of the line, fast processor, multiple hard drives, and a lot of RAM memory. A workstation may also have special audio, video, or processing cards for special editing work. A workstation is marketed by computer manufacturers to professional users, while the server is more of a utility device.
Both form part of the networking architecture and differ in their functions and use.