bus topology
Such topology is called star.
Star Topology WAN
A star topology; a network topology in which endpoints on a network are connected to a common central device by point-to-point links.
star topology
It is called a Star topology
point-to-point
A star topology is a type of mathematical topology. Mathematical topology is essentially geometry without concern for distance. It asks questions such as for a given shape, (in the abstract sense) "what connects to what," "is it possible to reach point x from point y without passing through point z," and "are these two points connected at all?" A star topology is a type of topology where all the points (for example, computers in a computer network) are connected to a central point, but not directly to each other. Go to the following address to see several types of network topologies, including a star topology. http://scilnet.fortlewis.edu/tech/Network/Topologies.htm
Star Topology
Star
In a star topology only the failed system would have a problem, unless the device was the network connectivity device (on a LAN).In a WAN, if the building was connected through the central building and the central building had a problem then all buildings would be affected. If it isn't the central connection point then only the building with the problem would be affected.
Star Topology is the most common type of network topology that is used in homes and offices. In the Star Topology there is a central connection point called the hub which is a computer hub or sometimes just a switch. In a Star Network the best advantage is when there is a failure in cable then only one computer might get affected and not the entire network.