Comprising billions of computers and Internet gadgets, the Internet is an interconnected system of networks. Among the most often used networks forming the internet infrastructure are these: Among the most often used networks forming the internet infrastructure are these: Local Area Networks (LANs) are systems that link computers in a quite limited area, like that of an office or a house. LANs may pool resources like networking storage, even printers and scanners. Commonly known as Wi-Fi, Ethernet, and wireless fidelity are two technologies utilized in present LANs. At home or his place of business, everyone has a wireless connection to link his gadgets. While WANs link networks across a vast region, say in a city or nation, LANs are constrained geographically, for example in a single building. They use fiber optics, phone lines, mobile phone networks, and satellites among other facilities in data transmission. High-speed WANs in the form of an internet backbone link nations and continents one after another. Wi-Fi networks employ mobile wireless radio communication signals over short distances without the need for cords. Consequently, without the necessity of cables and at great distances, cellular networks allow communication via mobile phones and other devices. Higher speed with more coverage is predicted to define Wireless Networks or 5G Networks in the future. The physical means by which the Internet established modern access to the Internet across public and private and home connections worldwide are broadband networks, cellular networks, and enterprise networks—the several physical layer networks that make up the Internet system. Then, complex programming facilitates the movement of signals throughout this very varied hardware network.