Which of the following network topologies provides the best redundancy for critical infrastructure?

Correct answer: Mesh topology

A mesh topology provides the best redundancy because every node connects directly to every other node, creating multiple independent paths between any two points; if one link or node fails, traffic can be rerouted through alternate paths with no single point of failure. Option B, star topology, is easy to manage but centers on a single hub or switch, making that central device a critical single point of failure. Option C, ring topology, routes traffic in a loop so a single broken link or failed node can disrupt the entire ring unless dual-ring protection is implemented. Option D, bus topology, uses a single shared medium, meaning any break in that cable brings down all connected devices.