TYPES OF NETWORK TOPOLOGIES (MESH Topology (Advantages of Mesh Topology :-…
TYPES OF NETWORK TOPOLOGIES
Called Linear Bus topology.
Features of Bus Topology
It transmits data only in one direction.
Every device is connected to a single cable
Advantages of Bus Topology
It is cost effective.
Cable required is least compared to other network topology.
Used in small networks.
It is easy to understand.
Easy to expand joining two cables together.
Disadvantages of Bus Topology
Cables fails then whole network fails.
If network traffic is heavy or nodes are more the performance of the network decreases.
Cable has a limited length.
It is slower than the ring topology.
Forms a ring as each computer is connected to another computer.
Features of Ring Topology
A number of repeaters are used for Ring topology with large number of nodes
2.The transmission is unidirectional, but it can be made bidirectional by having 2 connections between each Network Node, it is called Dual Ring Topology.
In Dual Ring Topology, two ring networks are formed, and data flow is in opposite direction in them. Also, if one ring fails, the second ring can act as a backup, to keep the network up.
Data is transferred in a sequential manner that is bit by bit. Data transmitted, has to pass through each node of the network, till the destination node.
Advantages of Ring Topology
Transmitting network is not affected by high traffic or by adding more nodes, as only the nodes having tokens can transmit data.
Cheap to install and expand
Disadvantages of Ring Topology
Troubleshooting is difficult in ring topology.
Adding or deleting the computers disturbs the network activity.
Failure of one computer disturbs the whole network.
A single hub through a cable connected to the central node.
Features of Star Topology
Can be used with twisted pair, Optical Fibre or coaxial cable.
Hub acts as a repeater for data flow.
Every node has its own dedicated connection to the hub
Advantages of Star Topology
Fast performance with few nodes and low network traffic.
Hub can be upgraded easily.
Only that node is affected which has failed, rest of the nodes can work smoothly.
Easy to setup and modify.
Easy to troubleshoot.
Disadvantages of Star Topology
Cost of installation is high.
Expensive to use.
If the hub fails then the whole network is stopped because all the nodes depend on the HUB.
Performance is based on the hub that is it depends on its capacity
All the network nodes are connected to each other. Mesh has n(n-1)/2 physical channels to link n devices.
There are two techniques to transmit data over the Mesh topology:
The same data is transmitted to all the network nodes, hence no routing logic is required.
The network is robust, and the its very unlikely to lose the data.
But it leads to unwanted load over the network.
To direct the data to reach the destination using the shortest distance
Types of Mesh Topology
Partial Mesh Topology :
connected in the same fashion as mesh topology but some devices are only connected to two or three devices.
Full Mesh Topology :
Each and every nodes or devices are connected to each other.
Features of Mesh Topology
Advantages of Mesh Topology :-
It is robust.
Provides security and privacy
Each connection can carry its own data load.
Fault is diagnosed easily.
Disadvantages of Mesh Topology
Cabling cost is more.
Bulk wiring is required
Installation and configuration is difficult.
It is also called hierarchical topology. It should at least have three levels to the hierarchy.
Features of Tree Topology
Ideal if workstations are located in groups.
Used in Wide Area Network.
Advantages of Tree Topology
Expansion of nodes is possible and easy.
Easily managed and maintained.
Extension of bus and star topologies.
Error detection is easily done.
Disadvantages of Tree Topology
Central hub fails, network fails.
If more nodes are added maintenance is difficult.
Two different types of topologies which is a mixture of two or more topologies.
One department ring topology is used and in another star topology is used, connecting these topologies will result in Hybrid Topology (ring topology and star topology).
Features of Hybrid Topology
It is a combination of two or topologies
Inherits the advantages and disadvantages of the topologies included
Advantages of Hybrid Topology
Reliable as Error detecting and trouble shooting is easy.
Scalable as size can be increased easily.
Disadvantages of Hybrid Topology
Complex in design