Networking refers to the process of connecting multiple devices together to share data and resources. Networks can be classified based on their size, topology, and protocols used. Local Area Networks (LANs) are used for connecting devices within a small geographical area, while Wide Area Networks (WANs) are used for connecting devices across larger geographical distances. Network topologies can be classified into bus, ring, star, mesh, and hybrid topologies. Network protocols govern the way data is transmitted and received over a network, with popular protocols including TCP/IP, HTTP, FTP, and DNS. Networking plays a critical role in modern-day communication and allows for efficient sharing of information and resources among devices.