Network is that environment in which we can communicate with each other and other unique devices and mediums. In easy mode we can define Network is medium via using this network we can transfer and exchanges the information b/w one system to another system. But in technically language Network connectivity describes the extensive process of connecting various parts of a Network to one another for example through the use of routers, switches and gateways, and how that process works. Network have many form likes Mobile Network ,TV Network and Computer Network etc.There are many different Networks topologies are available in Computer Network which are hub, linear, tree and star designs, each of which is set up in its own way to facilitate connectivity between computers or devices. Each has its own pros and cons in terms of Network connectivity.