internet (Internet) is a general term that generally refers to a computer network interconnected by multiple computer networks. The communication protocol (ie, communication rules) between the networks can be chosen arbitrarily, and it is not necessary to use the TCP/IP protocol.
Internet (Internet, Internet) is a proper noun, referring to the current world's largest, open, specific Internet that is interconnected by many networks. It uses the TCP/IP protocol suite as a communication rule, and its predecessor is the United States. ARPANET.