This tutorial defines the main differences in between Physical Topology and Logical Topology. Learn what physics topology and logical topology are and how they different from every other.

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Network topology defines how the network is structured and how the devices on the network communicate. It consists of 2 parts; physical and also logical. The physical part describes the physical layout of the network when the logical part describes how data flows in the network. Both, physical and logical parts are additionally known as physical topology and logical topology.

Physical component (topology) + Logical part (topology) = Network topology

The adhering to image shows exactly how physical topology and also logical topology work-related in network topology.

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Physical topologies


Physical topology defines the physical layout that the network. It explains how the gadgets in the network space physically connected and what happens when a node top top the network fails. It additionally specifics the plan of cabling and also how cables attach one machine to one more in the network.

The most common physical topologies space the following.

Bus Topology: - In this topology, devices affix in a line. Coaxial cables are used to affix devices in the sequence.

Star Topology: - In this topology, devices attach to a centralized device. A Hub or a move is provided as the centralized device.

Hybrid Topology: - as soon as a bus topology is offered to extend the star topology, it is known as hybrid topology.

Mesh Topology: - In this topology, gadgets directly connect. There room two varieties of mesh topology: partial mesh and also full mesh. In partial mesh, only some tools have straight connections while in the full mesh all tools have straight connections.


To learn the above topologies in detail, you can examine the adhering to tutorial.

Network Topologies defined with Examples

This tutorial defines physical topologies in detail together with their benefits and disadvantages.


Logical topologies

Logical topology specifies the logical layout the the network. It defines how the gadgets in the network connect with each other and how data is sent . The three key logical topologies space bus topology, ring topology, and switched topology.

Bus topology

Bus topology uses the one-to-all method. In this method, once a device transmits a message, the message reaches every the nodes of the exact same link. Every nodes review the message and also determine whether the article is intended for them. A node procedures the message just if it is intended because that it. A node supplies the destination deal with of the article to determine whether the article is intended because that it. Each message has actually a location address. If the blog post is no intended for the node, the node discards the message.

Ring topology

Ring topology uses the one-to-one method. In this method, every node receives data only from one node and also transmits data just to one node. Data is passed sequentially from node to node. A token device is supplied to determine the node that deserve to transmit data. Only one node deserve to transmit data in ~ a time. A node have the right to transmit data just if it has actually the token. After transmitting data, the node passes the token to the following node. As soon as a node obtain data, it checks whether the data belongs to it. If the data is no intended for it, it overcome the data come the next node.

The following image shows exactly how data is sent in both topologies.

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Switched logical topology

Switched topology creates end-to-end relations on demand. In this method, there is constantly an electric connection between nodes and also the switch. When the move receives a data packet, it checks the resource address and also destination deal with of the packet and also creates a reasonable connection in between the sender node and the receiver node. Once the transmission is over, the move terminates the reasonable connection.

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The following table explains how network topology provides logical topology and physical topology.

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The adhering to table defines how network topology offers logical topology and physical topology.


Network TopologyPhysical TopologyLogical topologyDescription
EthernetBus or starBusThis is the timeless implementation that Ethernet network topology. In this implementation, reasonable bus topology is enforced as a physics bus or star topology. When it is implemented as a physics star topology, a Hub is offered in the center of the topology. Regardless, whether you usage a physics star or bus topology, data sent indigenous a node is got by all various other nodes.
Wireless LANsStarBusIn this implementation, devices connect through a central access point. Just one device can transmit data at a time and all devices listen come the transmission. Because datatransfer by one device is obtained by all various other devices, a Wireless LAN is considered as a logical bus topology.
Token Ring and also FDDIRingRingThis implementation provides an MAU (Multi-station access unit) to connect devices. MAU create a logical ring, therefore data is passed indigenous node come node in a pre-defined sequence until it get the location device.
EthernetSwitchedStarThis is the modern-day implementation of Ethernet network topology. This implementation supplies a physics star topology to run a switched reasonable topology. In this implementation, the switch dynamically creates logical circuits between two devices whenever lock exchange data. Practically all contemporary networks use this implementation.

Conclusion

Network topology defines the layout of the network. It consists of physics topology and logical topology. Physical topology defines the physical layout that the network while reasonable topology defines data operation on the physics layout.

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