Cellular networks are communication networks where the last link is wireless, enabling mobile devices to connect to the internet and other networks through radio waves. They are structured in a hierarchical architecture with cells, each served by a base station, to efficiently manage spectrum and provide wide coverage.
An alarm system is a network of interconnected devices designed to detect unauthorized entry or other hazards and alert users or authorities to take action. These systems are essential for enhancing security in residential, commercial, and industrial settings, often incorporating sensors, control panels, and communication technologies.