What is logical topology?
A logical topology is a concept in the network that defines the architecture of the communication mechanism for all nodes in a network. Network devices such as routers and switches can be used to dynamically manage and reconfigure the logical topology of a network.
Logical topologies are in contrast to physical topologies, which relate to the physical connections of all devices in the network.
The logical topology defines how the data is to be transferred. Compare this to the physical topology, which consists of the layout of cables, network devices, and cabling.
Two of the most common logical topologies are:
Bus topology: Ethernet uses the logical bus topology to transfer data. Under a bus topology, a node sends the data to the entire network. All other nodes in the network hear the data and check whether the data is intended for them.
Ring topology: In this topology, only one node is allowed to transmit the data in a network at any given time. This mechanism is achieved through tokens (the node with the token can only transmit the data in one network) and therefore the collision in one network can be avoided.