Euler made some basic contributions which are now considered topology. However, topology was not recognized as a separate field in mathematics until the twentieth century (several hundred years after Euler.) It would probably be best to say that Poincarre pioneered the subject which became topology.
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Leonard Euhler
math and arithmetic
It is called topology
Star topology
A star topology.
A star topology; a network topology in which endpoints on a network are connected to a common central device by point-to-point links.
bus topology
It is called a Star topology
STAR Topology
in star topology , the central hub is called...... (i) active hub (ii) passive hub (iii) inactive hub (iv) live hub
Star topology:- In this topology all PC are connected with the central device. Central may be HUB and SWITCH. Star widely use in all over word. Ring topology:- In this ring topology all PC are connected in the frame of ring are close Ring topology use MSAU each PC has a two never road one is called up Stream and called down stream. It used token passing Matterhorn which implement the token ring network. " Is the best of star topology".
Such topology is called star.
It is a Client/Server system. The most common topology for this is a Star topology.
both hubs and switch can act as a center of a star topology
One of the most popular topologies for Ethernet LANs is the star and extended star topology. It is easy to setup, it's relatively cheap, and it creates more redundancy than the Bus Topology. The Star Topology works by connecting each node to a central device. This central connection allows us to have a fully functioning network even when other devices fail. The only real threat to this topology is that if the central device goes down, so does the entire network. The Extended Star Topology is a bit more advanced. Instead of connecting all devices to a central unit, we have sub-central devices added to the mix. This allows more functionality for organization and subnetting- yet also creates more points of failure. In many cases it is impractical to use a Star Topology since networks can span an entire building. In this case, the Extended Star Topology is all but necessary to prevent degraded signals. Whereas the Star Topology is better suited for small networks, the Extended Star Topology is generally better for the larger ones.