A network is a way to connect two or more devices together so that they can exchange information. In order to make this work, each device must know when another is trying to connect to it and it must know how to reply. The network consists of a whole suite of protocols to make this work. A protocol is just a set of rules that each device uses to communicate with other devices. To connect the machines physically different type of topologies are used, like LAN (Local Area Network), WAN (Wide Area Network), MAN (Metropolitan Area Network, SAN (Storage Area Network), SAN (System Area Network) SAN (Small Area Network), SAN (Server Area Network), PAN (Personal Area Network), DAN (Desk Area Network), CAN (Controller Area Network), CAN (Cluster Area Network) that are further categorized into topologies like Bus, Ring, Star, Tree, Mesh. JAKS currently using the Bus & Star topology because of more complex networks can be built as hybrids of two or more of the above basic topologies.