Description: Creating a Fog topology in iFogSim involves defining a hierarchy of fog devices, edge devices, and cloud resources. Fog devices are instantiated with specific resources, such as processing power, bandwidth, and power models, and connected to form a network with communication links specifying bandwidth and latency. Edge devices serve as intermediaries between fog devices and the cloud. The topology supports multiple levels of infrastructure, including cloud servers and sensors, with task routing, scheduling, and workload management defining how data and tasks flow across the devices in the network.