Which topology has every computer connected to every other computer?

• A. Mesh
• B. Ring
• C. Star
• D. Bus

Answer: (A)

The key idea is direct, all-to-all connectivity. In a mesh topology, every computer has a direct link to every other computer, so any pair can communicate without passing through intermediate devices. This setup provides high redundancy and strong fault tolerance because alternate direct paths exist if some links fail.

Other topologies don’t meet this criterion. A ring connects each computer to two neighbors in a loop, so messages travel around the circle rather than along direct links to every other node. A star has all computers connected to a central hub, so two machines talk through that hub rather than having their own direct connection. A bus uses a single shared backbone for all devices, meaning they don’t have direct, pairwise connections to each other.

So, the topology where every computer is connected to every other computer is a mesh topology.