220-801 Question #490: Real Exam Question with Answer & Explanation

The correct answer is B: Bus. In a bus topology, all devices share a single communication line (the 'bus'). A failure anywhere on the main cable disrupts communication for all devices connected to it downstream from the break, because data travels linearly along the single backbone. In a star topology, a devi

Question

Which of the following network topologies is the MOST likely to affect other downstream devices if an issue occurs?

Options

AMesh
BBus
CStar
DRing

Explanation

In a bus topology, all devices share a single communication line (the 'bus'). A failure anywhere on the main cable disrupts communication for all devices connected to it downstream from the break, because data travels linearly along the single backbone. In a star topology, a device failure only affects that single device (not others). In a ring topology, a break can affect the ring but modern rings often have redundancy. In a mesh topology, multiple redundant paths exist, so a single failure rarely disrupts other devices. Bus is the most vulnerable to cascading failures.

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