問71
頻出度★★★
移動体通信サービスのインフラを他社から借りて, 自社ブランドのスマートフォンや SIM カードによる移動体通信サービスを提供する事業者を何と呼ぶか。
令和3年度 ITパスポート試験 問71
テクノロジ系ネットワーク › ネットワーク応用
This question's explanation and your answers so far.
解説
問 71
Incorrectア
ISP stands for Internet Service Provider, a business that connects users to the internet. It is not a business that leases mobile communication infrastructure and provides mobile phone services under its own brand, so it is wrong.
Incorrectイ
MNP stands for Mobile Number Portability, a term for the mechanism that lets you keep the same phone number even after switching carriers. It is not the name of a type of business, so it is wrong.
- ウ
正解 The correct answer is ウ, MVNO. MVNO stands for Mobile Virtual Network Operator. It refers to a business that does not own its own wireless communication equipment (infrastructure such as base stations) but instead leases the equipment of another company (a major carrier, i.e., an MNO) and provides mobile communication services under its own brand using smartphones and SIM cards. The stem's phrases 'leasing infrastructure from another company' and 'providing service under its own brand with smartphones and SIM cards' match this definition exactly, so ウ is correct. So-called low-cost SIM providers are a typical example.
Incorrectエ
OSS is an abbreviation for things like Open Source Software in the software field (in telecommunications it can also mean Operations Support System, but either way), and it is not the name for a business that provides mobile communication services, so it is wrong.
ここがポイント
- MVNO = a business that leases another company's (an MNO, i.e., a major carrier's) mobile communication infrastructure and provides mobile phone and SIM services under its own brand (so-called low-cost SIM).
- Distinguishing confusing telecom abbreviations: ISP = internet access provider, MNP = switching carriers while keeping your number, MVNO = a carrier that leases its equipment.
用語