CISA Question #180: Real Exam Question with Answer & Explanation

Question

Recovery facilities providing a redundant combination of internet connections to the local communications loop is an example of which type of telecommunications continuity?

Options

• ALast-mile circuit protection
• BVoice recovery
• CLong-haul network diversity
• DAlternative routing

Explanation

Last-mile circuit protection specifically addresses redundancy at the local communications loop - the final segment connecting a facility to the broader network. Providing redundant internet connections at this entry point ensures that if one carrier or physical path fails, another can maintain connectivity, which is the defining characteristic of last-mile circuit protection.

Why the distractors are wrong:

• B (Voice recovery) focuses on restoring telephone/voice services specifically, not on protecting the physical internet circuit infrastructure.
• C (Long-haul network diversity) applies to backbone/wide-area paths across cities or regions - far upstream from the local loop.
• D (Alternative routing) is a valid telecom concept but refers to dynamically redirecting traffic through different network paths mid-journey, not to hardening the local connection point itself.

Memory tip: Think of the "last mile" as the most vulnerable link in the chain - it's the short stretch from the telephone pole (or ISP) to your door. "Last-mile protection" = protecting that specific stretch with redundant pipes, so when an exam question mentions local loop redundancy, map it directly to last-mile circuit protection.

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