There are 6 types of Topologies:
- BUS Topology:
Advantages:
- It work faster as compared to other topologies.
- Ease of Installation.
- It uses less cabling than Mesh or Star topology.
Disadvantages:
- Difficult re-connection and Fault isolation.
- A fault or break in the bus cable stops all transmission.
- Mesh Topology:
- In a Mesh topology, Every device has a dedicated point-to-point link to every other device. The term dedicated means that the link carries traffic only between the two devices it connects.
- In this Every node is connected to n-1 nodes where n = number of devices in topology.
- No. of Links= n(n-1)/2 where n = number of devices in topology.
Advantages:
- No Congestion, Because of point-to-point connectivity throughout the network.
- No need to Broadcast the data to all the devices.
- Mesh topology is Robust.
- Privacy and Security.
Disadvantages:
- More amount of cable is used.
- More no. of ports are used.
- STAR Topology:
- In this, each device has a dedicated point-to-point link only to a central controller, usually called a HUB.
- It doesn't allow direct traffic between devices.
- If one device want to send data to another, it send data to the controller which then relays the data to the connected device.
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Advantages:
- Less expensive then MESH topology.
- Easy to install and re-configure.
- Less cabling is used to be housed.
- Robustness
Disadvantages:
- If the HUB goes down, the whole system is dead.
- Requires more cabling then MESH.
- Each device has a dedicated point-to-point connection with only the two devices on either side of it.
- A signal is passed along the ring in one direction from device to device, until it reaches its destination.
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Advantages:
- Easy to install and re-configure.
- Less expensive.
Disadvantages:
- Uni-directional traffic.
- A break in the ring can disable the entire network.
- Tree Topology:
- In this, network is in the form of a tree, every device is connected to a parent device and may have further child devices connected to it.
- Now a days, not in use.
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NOTE: A major disadvantage of this topology is that if parent device stops working then the rest of the network beneath that device will stop working.
- HYBRID Topology:
- A network can be hybrid
- For example, we can have a main bus topology with branch connecting several stations in a star topology as shown in the figure.
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Advantages:
- Reliable: Fault detection and troubleshooting is easy in this type of topology.
- Scalable: Its easy to increase the size of network by adding new components, without disturbing existing architecture.
- Flexible: Hybrid Network can be designed according to the requirements of the organization and by optimizing the available resources.
- Effective: Hybrid topology is the combination of two or more topologies, so we can design it in such a way that strengths of constituent topologies are maximized while there weaknesses are neutralized.
Disadvantages:
- Complexity of Design: One of the biggest drawback of hybrid topology is its design. Its not easy to design this type of architecture and its a tough job for designers. Configuration and installation process needs to be very efficient.
- Costly Infrastructure: As hybrid architectures are usually larger in scale, they require a lot of cables, cooling systems, sophisticate network devices, etc.
Made By: P & V
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