A network is a system of interconnected elements that work together to share information or resources. This can refer to computer networks, where devices like computers, servers, and routers communicate over the internet, allowing users to access data and services. It can also describe social networks, where individuals connect and interact with each other, sharing ideas and experiences. In a broader sense, networks can be found in various fields, such as biology, where neurons form networks to transmit signals in the brain, or in transportation, where roads and railways connect different locations. These networks help facilitate communication, collaboration, and movement, making them essential to modern life.