AP CSP Day 29: List Mutation
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Practice Question
A school network connects the main building to the library through two independent paths: a fiber optic cable and a wireless link. Which of the following best describes the benefit of having both paths?
Redundant paths provide fault tolerance. If the fiber optic cable is damaged, the wireless link can still carry traffic, and vice versa. This ensures continued connectivity even when one component fails.
A) Redundancy provides reliability, not necessarily doubled speed. Load balancing can improve throughput but the primary purpose of redundancy is resilience. C) Energy efficiency is not the purpose of network redundancy. D) Either path alone can handle traffic — both being active simultaneously is not required.
Students think the primary benefit of redundancy is speed rather than reliability. The key advantage is that the system continues working when a component fails.
Redundancy = backup systems for reliability. On the AP exam, the correct answer about redundancy almost always relates to continued operation during failures, not performance improvement.
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