IPA IP 2022 Question 41
A question IPA Japan published in 令和4年度 ITパスポート試験 公開問題 問41, translated into English. ITPEC is based on the same exams.
Same question on ITPEC: Apr 2026 Q60
A satellite office is constructed in a company that promotes telework. Measures to prevent overcurrent caused by lightning strikes were examined for network devices and PCs used in the satellite office. Which of the following is the most appropriate effective measure?
Explanation
Installation of devices supporting surge protection — they divert the lightning-induced voltage spike before it reaches the equipment.
A lightning strike nearby induces a brief but very high voltage on power and communication lines, and the resulting overcurrent can destroy PCs and network devices. A surge protection device (surge protector, SPD) conducts that excess to ground and lets normal power and signals through. It is fitted on the power supply and also on the network and telephone lines entering the equipment.
Answer (b)
Why not others:
- •(a) — green IT devices save energy and reduce environmental impact; they do not stop a surge
- •(c) — a wireless LAN router changes how devices connect to the network; it is itself exposed to surges on its power and line connections
- •(d) — a UPS keeps power supplied through a momentary drop or a short outage; ordinary UPS units are not designed to absorb a lightning surge
Key rule: Match the facility measure to the power problem: a surge protector for lightning spikes, a UPS for momentary drops and short outages, a generator for long outages.
Service Management · AI-written, may contain errors
This question comes from the past questions IPA Japan publishes, translated into English by ITPEC Practice. ITPEC Practice is an independent study tool and is not affiliated with IPA or ITPEC. See the original paper (PDF) or Report an issue.