IPA FE Subject A sample Question 33

A question IPA Japan published in 基本情報技術者試験科目A サンプル問題問33, translated into English. ITPEC is based on the same exams.

Which of the following is the effect that can be expected as an information security measure by introducing a UPS?

a)It prevents a PC from being infected with malware through power line communication (PLC).b)It prevents information leakage in communication between a server and terminals.c)It prevents data corruption caused by a momentary power interruption.d)It prevents the contents of e-mails from being falsified.

Explanation

Preventing data corruption caused by a momentary power interruption — a UPS protects availability and integrity against power trouble.

A UPS (uninterruptible power supply) sits between the mains and the equipment and supplies power from its battery the moment the mains drops or dips. A momentary interruption then never reaches the server, and in a longer outage the battery gives time to shut the system down normally, so files and databases are not left half-written and corrupted.

Answer (c)

Why not others:

•(a) — a UPS supplies power; it does not inspect data, so it cannot stop malware arriving over power line communication
•(b) — preventing leakage in server–terminal communication needs encryption such as TLS or a VPN
•(d) — detecting or preventing tampering with e-mail content needs a digital signature such as S/MIME

Key rule: A UPS covers power failures and momentary drops (bridging and safe shutdown); confidentiality and tampering are handled by encryption and signatures.

Service Management · AI-written, may contain errors

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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.