ITPEC IP October 2018 Question 39
When an abnormality in power supply voltage caused by power failure, lightning strike, etc. has been detected, a company wishes to inform its computers of this event, continue supplying power for a certain period of time, and safely shut down systems. Which of the following is an appropriate device that should be installed between computers and the power supply for this purpose?
Explanation
UPS — an uninterruptible power supply keeps the computers running on its battery when the power fails, signals them, and gives them time to shut down safely.
A UPS sits between the power supply and the computers. When it detects a power failure or abnormal voltage, such as a surge from a lightning strike, it switches to its battery at once, so the computers keep running for several minutes. Connected to them by cable or network, it notifies the computers, and their software saves data and shuts the systems down in order before the battery runs out. For outages longer than the battery lasts, a private power generator takes over.
Answer (c)
Why not others:
- •(a) DMZ — a network segment between the Internet and the internal network, separated by a firewall, where public servers are placed
- •(b) GPU — a processor specialised in image processing and parallel computation
- •(d) VPN — a virtual network set up over a public network and used like a dedicated line
Key rule: A UPS buys time, not unlimited power: it bridges a short outage and allows an orderly shutdown, while long outages need a generator.
Service Management · AI-written, may contain errors
This question comes from an official ITPEC past paper. ITPEC Practice is an independent study tool and is not affiliated with ITPEC. See the official IP past-paper collection or Report an issue.