what is Computer network? discuss about various Computer network
A computer network is a collection of interconnected computing devices that can communicate with each other to share resources and information. A computer network can be wired or wireless and can range in size from a small local area network (LAN) to a large wide area network (WAN) that spans the globe.
There are several different types of computer networks, including:
Local Area Network (LAN): A LAN is a network that covers a small geographic area, such as an office or a building. LANs typically use Ethernet cables or Wi-Fi to connect devices.
Wide Area Network (WAN): A WAN is a network that covers a larger geographic area than a LAN, such as a city or a country. WANs typically use long-distance communication technologies like leased lines or satellites to connect devices.
Metropolitan Area Network (MAN): A MAN is a network that covers a larger area than a LAN but a smaller area than a WAN, such as a city or a town. MANs typically use high-speed fiber optic cables to connect devices.
Personal Area Network (PAN): A PAN is a network that covers a very small area, typically less than 10 meters. PANs are commonly used for wireless devices such as Bluetooth headsets or wireless keyboards.
Storage Area Network (SAN): A SAN is a specialized network that provides high-speed access to storage devices such as hard drives or tape libraries. SANs typically use fiber optic cables and advanced network switches to provide fast and reliable data access.
Virtual Private Network (VPN): A VPN is a network that allows users to access a private network over a public network such as the internet. VPNs typically use encryption and tunneling technologies to provide a secure connection.
Wireless Sensor Network (WSN): A WSN is a network that consists of a large number of wireless sensors that are used to monitor environmental conditions, such as temperature, humidity, or air quality. WSNs are commonly used in environmental monitoring, agriculture, and industrial automation.
In summary, computer networks are an essential part of modern computing, and there are many different types of networks that can be used for different purposes. By connecting devices together, computer networks can provide access to resources and information that would be difficult or impossible to access otherwise, making them an essential part of modern business, research, and communication.