The Internet is a global system of interconnected computer networks that use Internet Protocol (TCP/IP) to link devices around the world. It is a network of networks consisting of millions of private, public, academic, business and government networks, local and global in scope, which are interconnected by a broad set of electronic exchange technologies.
The development of the Internet began in the 1960s as a project of the United States Department of Defense. In the 1980s, it became accessible to the general public, and as time progressed, connection technologies such as telephone modem lines, dial-up access, broadband, and more recently, mobile connections have enabled increasingly faster access to the network.
The web, one of the main applications of the Internet, was invented at CERN in 1989 and allowed easy access to information through hyperlinks and web pages. The evolution of web technologies and the growth of Internet infrastructure have enabled the development of numerous online services, such as email, social networking, online shopping, and media streaming.
The Internet is powered by a vast network of fiber optics, copper cables, wireless connections, and satellite systems that transmit data across the globe. Data travels in packets and is sent through routers and servers until it reaches its destination. Each device connected to the Internet has a unique IP address that allows its identification and location.
Domain name servers (DNS) play a crucial role in translating website addresses (URLs) into corresponding IP addresses. Internet protocols, such as TCP/IP, HTTP, SMTP, and FTP, set the rules for data transmission on the network.