A computer network is a collection of two or more two machines or devices connected with each other to share a resource. The resource can be in the form of pictures, videos, text files, and vice versa. Usually, the networks contain a client/server model. The client in the network generates the requests and the server responds to the multiple requests at the main time. The network can be LAN (Local Area Network) or WAN (Wide Area Network). LAN contains private networks or few network devices whereas WAN contains a collection of LAN networks with complex connectivity across the globe.