An Ad Hoc Network is a type of wireless network that is created spontaneously without a fixed infrastructure. Devices in this network communicate directly with each other, forming a temporary network that can be easily set up and dismantled. This flexibility makes ad hoc networks useful in situations like emergency response or military operations, where traditional network setups may not be feasible. In an ad hoc network, each device acts as both a host and a router, forwarding data to other devices. This decentralized approach allows for dynamic connections and can adapt to changes in the network, such as devices joining or leaving. Examples of ad hoc networks include Bluetooth connections and Wi-Fi Direct setups.