Star topology is one of the oldest topology
LAN based or a WAN based topology
A topology is the physical configuration of a network. Each network has their own particular type of topology, with the most common being LAN or WAN. Irregular topology is a common topology of LAN, where the information is sent through random connections between computers.
In a LAN, the star topology is very common.
For a topology, the most common is a star topology.
Network topology is the manner in which the physical components of a LAN are connected together. Network topology can be either physical or logical.
A hub
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he most commonly used network topology is a hybrid topology called the Star Bus TopologyRead more: http://wiki.answers.com/What_is_network_topology_and_give_an_example_of_the_most_common_network_topology#ixzz1TrCMGlb6
The most common LAN topology is that of a "star." In a star topology, each computer, or "node", is connected to a central hub. This is more reliable than a more classical "ring" topology, because a node failing will not bring down the entire network. A bus topology is arguably more reliable, but has poorer performance.
The best topology, whether it is a LAN based or a WAN based topology, is the one best suited for your environment. There is no one best topology for all situations.
Bus topology is used on a LAN, or a Local Area Network. It is the cable to which the nodes connect, and it is also known as a backbone.