**What is the purpose of a network topology in IT infrastructure?**
The network topology defines the arrangement of different elements in an IT infrastructure, including nodes, connections, and devices. Its primary purpose is to create a visual map of how various components interact and communicate, which is essential for troubleshooting, optimizing performance, and ensuring scalability. Different topologies—like star, mesh, and bus—each have unique advantages and disadvantages depending on organizational needs. By understanding network topology, IT professionals can better design and manage networks, ensuring reliable performance and security.