Network Architecture refers to the design and structure of a computer network. It outlines how different components, such as servers, routers, and switches, are interconnected and communicate with each other. This design can vary based on the network's purpose, size, and technology used, ensuring efficient data flow and resource sharing. There are several types of network architectures, including client-server and peer-to-peer models. The client-server model centralizes resources on a server, while the peer-to-peer model allows devices to share resources directly. Understanding these architectures helps in building and managing effective networks for various applications.