A Radio Access Network (RAN) is a crucial part of mobile telecommunications that connects individual devices, like smartphones, to the core network. It consists of base stations, antennas, and other equipment that facilitate wireless communication. The RAN handles the radio signals that allow users to make calls, send texts, and access the internet. RANs can be classified into different types, such as 2G, 3G, 4G, and 5G, each offering varying speeds and capabilities. The evolution of RAN technology has significantly improved mobile connectivity, enabling faster data transfer and better overall user experiences in mobile networks.