The term service used in the context of client-server architecture refers to the abstraction of a resource. The resource could be of any type and based on the one provided by the server (service); the server is named accordingly. For example, if the server provides web pages, it is called a web server, and if the server provides files, it is called a file server, and so on. A server can receive requests from any number of clients at a specific point in time. But any server will have its own limitations about its processing capabilities. Often, it becomes necessary for a server to prioritize the incoming requests and service them as per their priority. The scheduling system present in the server helps the server with the assignment of priorities.

Client-server benefits are in addition to separation of concerns and help with the following:

• Improving the portability of the user interface
• Improving scalability by simplifying server implementations
• Developing with standalone, independent testable components