Computer Networks

A computer network is a group of computer systems and devices that are connected together and able to communicate with each other. Computer networks can be classified according to the geographical area that they cover and the type of connections that they use.

There are several types of computer networks, including:

Local Area Networks (LANs):

     A LAN is a computer network that covers a small geographical area, such as a home, office, or small group of buildings. LANs are typically used to connect computers and devices in a single location and allow them to communicate with each other and share resources, such as printers and file servers.

Wide Area Networks (WANs):

     A WAN is a computer network that covers a large geographical area, such as a city, country, or the entire world. WANs are typically used to connect computers and devices in multiple locations and allow them to communicate with each other over long distances.

Metropolitan Area Networks (MANs):

     A MAN is a computer network that covers a metropolitan area, such as a city or town. MANs are typically used to connect computers and devices in multiple locations within a city or town and allow them to communicate with each other over a medium-sized geographical area.

Wireless Networks:

     A wireless network is a computer network that uses wireless technology to connect devices together. This allows devices to communicate with each other without the need for physical cables or wires.

Virtual Private Networks (VPNs):

     A VPN is a private network that uses a public network (such as the Internet) to connect remote sites or users together. VPNs use encryption and other security measures to protect the data transmitted over the network.

Cloud Computing Networks:

     A cloud computing network is a group of computers and servers that are connected together and allow users to access and use computing resources over the Internet. Cloud computing networks can be used to store, process, and manage data, as well as to host applications and services.

Fig .1 shows a computer network.

Fig 1 Computer Network