Which of the following is a server?
Server:-
A server is a computer program or a device that provides functionality for other programs or devices, called "clients". Servers can provide various functionalities, often called "services", such as sharing data or resources among multiple clients, or performing computation for a client.
WWW:-
The World Wide Web (WWW), also called the Web, is an information space where documents and other web resources are identified by Uniform Resource Locators (URLs), interlinked by hypertext links, and accessible via the Internet.
FTP mainframe:-
The File Transfer Program (FTP) is a standard network protocol used for the transfer of computer files between a client and server on a computer network.
HTTP:-
The Hypertext Transfer Protocol (HTTP) is an application protocol for distributed, collaborative, and hypermedia information systems. HTTP is the foundation of data communication for the world wide web.