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Module 1: Physical Layer & Data Communication

20212m

Which topology covers security, robust and eliminating traffic factor?

(i) Mesh
(ii) Ring
(iii) Star
(iv) Bus

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Answer

(i) Mesh topology

Explanation

A mesh topology connects nodes with multiple dedicated links. In a full mesh, every node has a direct connection to every other node.

This gives mesh topology strong reliability and robustness: if one link fails, traffic can often use another path. Dedicated links also reduce contention and unwanted traffic compared with a shared bus.

Option analysis

  • (i) Mesh: Correct. It is highly reliable, provides dedicated communication paths, and avoids the single shared communication medium of a bus.
  • (ii) Ring: Nodes share a logical ring; a link/node failure can disrupt communication unless redundancy is provided.
  • (iii) Star: Easy to manage, but the central device is a potential single point of failure.
  • (iv) Bus: Uses a shared medium, so collisions/traffic contention can occur.

Final answer: (i) Mesh.

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