~Internet~
It's a network of networks that consists of millions of private , public, academic, business, and government networks, of local to global scope, that are linked by a broad array of electronic, wireless and optical networking technologies.
-WAN: Wide Area Network is a computer network that covers a broad area.
-LAN: Local Area Network is a computer network that connects computers and devices in linmited areas.
-MAN: Metropolitan Area Network is a computer network that ussualy spans a city or a large campus.

~IP~
Is usually a numerical label assigned to each device ,participating in a computer network that uses the Internet Protocol for communication.


~Computer Network~
Referred to as a network, is a collection of computers and devices interconnected by communications channels that facilitate communications among users and allows users to share resources.

~TCPIP~
Is a description framework for computer network protocols created in the 1970s by DARPA, an agency of the United States Department of Defense. It evolved from ARPANET, which was the world's first wide area network and a predecessor of the Internet. The TCP/IP Model is sometimes called the Internet Model or the DoD Model.