. What do you understand by Computer Network? Explain the classification of computer network structures.

A computer network refers to a collection of interconnected devices, such as computers, servers, routers, and other networked equipment, that communicate with each other to share resources, data, and services. The purpose of a computer network is to allow these devices to exchange information, facilitating tasks such as file sharing, internet access, email communication, and collaborative work. Networks can range from simple home setups to complex, global networks such as the internet.

At its core, a computer network enables communication between devices, whether it’s sending data, accessing information from servers, or running applications that rely on shared resources. The communication in a network is typically governed by protocols, which are standardized rules that ensure data is transferred efficiently and correctly. Popular protocols include the Transmission Control Protocol/Internet Protocol (TCP/IP), which is the foundation of internet communication.

Classification of Computer Network Structures:

The classification of computer network structures is based on several criteria, such as geographical spread, scale, ownership, and the type of medium used for communication. These classifications help determine the best network design and technology for a given purpose. Below are the main types of computer network structures:

1. Based on Geographical Area:

This classification is based on the physical distance covered by the network.

• Personal Area Network (PAN): A PAN is the smallest type of network, designed to connect devices within a very limited range, typically within a few meters. It is used to link personal devices such as smartphones, laptops, tablets, and wearables. PANs typically use wireless technologies like Bluetooth and infrared to connect devices. For instance, connecting a smartphone to a Bluetooth headset or transferring files between two devices through Bluetooth is a typical example of a PAN.

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