Network topology

Basically networks are differentiated into four different topologies:

Star- topology	In this topology there is a central hub at which all devices are connected. Each device has its own line. If the central hub fails, the entire communication breaks down.
Line- topology	Devices are connected by short branch lines to a main line. Every communication flows over this main line. If this main line is interrupted, two segments are formed which normally continue functioning. Line topology is also called "Linear topology" or "Bus topology" . The CAN bus also uses this topology.
Ring- topology	The point-to-point connections between devices are representative of ring topology. All connections are arranged in a closed chain. The communication can be done in only one direction. If a section of line fails, the entire system no longer functions.
Tree- topology	The tree topology is characterised by branches at desired locations. Thereby flexible combinations from star and line topology are possible.