• सुखार्थी त्यजते विद्यं विध्यार्थी त्यजते सुखम्सु sखर्थीन: कुतॊ विद्या कुतॊ विध्यार्थीन: सुखम् ||
  • “Luxury people leave knowledge, but a student leaves Luxury No knowledge for one who seeks Luxury, No luxury for student”
  • न चोर हार्यं न च राज हार्यं न भात्रू भाज्यं न च भारकारि |व्ययं कृते वर्धत एव नित्यं विद्याधनं सर्वधनप्रधानम ||
  • Cannot be snatched away by thief, cannot be snatched away by king, Cannot be divided among brothers, Not heavy either If spent daily, it always keeps growing. The wealth of knowledge is the precious of wealth of all”

Mesh Topology




Mesh Topology

In a mesh topology, every device has a dedicated point-to-point link to every other device.

 

If there are n nodes in a fully connected mesh nodes We need n (n - 1) simplex  physical links. If each physical link allows duplex mode communication a mesh topology, we need n(n-1)/2 duplex mode links.

If n=5 nodes are connected in fully connected mesh topology number of duplex links  required are  5X(5-1) = 20 links are used.

Example of a mesh topology is the connection of telephone regional offices in which each regional office needs to be connected to every other regional office.


Advantages of Mesh Topology

The use of dedicated links guarantees that each connection can carry its own data load, thus eliminating the traffic problems that can occur when links must be shared by multiple devices.

 

It is robust topology . If one link becomes unusable, it does not means failure of the entire system.

 

Privacy or security. When every message travels along a dedicated line, only the intended recipient sees it. Physical boundaries prevent other users from gaining access to messages.

 

Point-to-Point links make fault identification and fault isolation easy.

 

Traffic can be routed to avoid links with problems. This enables the network administrator to discover the precise location of the fault and aids in finding its cause and solution.

Disadvantages of Mesh Topology

Amount of cabling and the number of I/O ports required.

 

As every device must be connected to every other device, installation and reconnection are difficult.

 

Bulk of the wiring can be greater than the available space in walls, ceilings, or floors.

 

Hardware required to connect each link (I/O ports and cable) is expensive.

 

For the above reasons a mesh topology is usually implemented in at limited locations e.g.  as a backbone connecting the main computers of a hybrid network that can include several other topologies.

Related Question:

Question:    Explain the working of mesh topology. Explain its advantages and disadvantages. How many duplex links are required to connect 6 fully connected nodes?     [10 marks]