問93
頻出度★☆☆
NFC に準拠した無線通信方式を利用したものはどれか。
平成31年度 春期 ITパスポート試験 問93
テクノロジ系コンピュータ構成要素 › 入出力デバイス
This question's explanation and your answers so far.
解説
問 93
Incorrectア
Wireless communication with an ETC onboard unit uses the DSRC (5.8 GHz band) scheme between the tollgate and the vehicle, a narrow-area communication that reaches up to several tens of meters. It is different from NFC, which is held close at very short range, so it is wrong.
Incorrectイ
Remote control of an air conditioner generally uses infrared (IR) optical communication and does not use NFC, which is a wireless (radio-wave) communication standard, so it is wrong.
Incorrectウ
Position measurement by car navigation works by receiving radio waves from GPS satellites overhead to determine the current location; both its mechanism and its purpose differ from NFC, which exchanges data at very short range, so it is wrong.
- エ
正解 The correct answer is エ. NFC (Near Field Communication) is a short-range wireless communication standard that lets a card or device communicate simply by being held close, at a very short distance of a few centimeters. Transit IC cards (such as Suica and PASMO) use a scheme called FeliCa, which conforms to NFC (NFC-F); by holding the card near the ticket gate, data is exchanged instantly over a distance of a few centimeters to process passage. Therefore, the one that uses a wireless communication method conforming to NFC is エ, “Ticket gate processing using a transit IC card”.
ここがポイント
- NFC is a short-range wireless communication standard that communicates by holding a device close at a very short distance of a few centimeters; it is used for transit IC cards, electronic money, and smartphone tap payments.
- Even among wireless technologies with similar uses, the methods differ—ETC uses DSRC (narrow-area communication), remote controls use infrared, and car navigation positioning uses GPS—so the point being tested is not to confuse them.
用語