What is a server ? What is a web server ?

A server is a computer that has server software loaded on it. Its main job is to manage network resources and share resources for clients. There are many types of servers — file server, mail server, web server etc.

A web server is a World Wide Web server that stores web documents and responds to the requests made by web browsers. It is a specific protocol type of server, looking only for HTTP requests instead of many different types of resource requests.