問73
頻出度★★★
LTE よりも通信速度が高速なだけではなく, より多くの端末が接続でき, 通信の遅延も少ないという特徴をもつ移動通信システムはどれか。
平成31年度 春期 ITパスポート試験 問73
テクノロジ系ネットワーク › ネットワーク方式
This question's explanation and your answers so far.
解説
問 73
Incorrectア
Blockchain is a distributed ledger technology that stores transaction records in a distributed way to prevent tampering; it is not a mobile communication system. It has nothing to do with communication speed or the number of connected devices.
Incorrectイ
MVNO refers to a carrier that does not own its own communication facilities but leases another company’s mobile network to provide communication services (a Mobile Virtual Network Operator); it is not a communication-system standard itself.
Incorrectウ
8K is a resolution standard for ultra-high-definition video with roughly 8000 horizontal pixels; it is a term in the video field, not a mobile communication system.
- エ
正解 The correct answer is “エ”. The three characteristics listed in the question — “faster than LTE”, “can connect many devices simultaneously”, and “low communication latency” — are all representative features of 5G, the fifth-generation mobile communication system. In addition to high speed and large capacity, 5G is built on three pillars: massive simultaneous connections (accommodating large numbers of IoT devices) and ultra-low latency, and it is designed as the next-generation standard succeeding LTE (4G). Because it matches all of the descriptions in the question, 5G is the correct answer.
ここがポイント
- 5G is the fifth-generation mobile communication system whose three main features are “high speed and large capacity”, “massive simultaneous connections”, and “ultra-low latency”; it is the next-generation standard succeeding LTE (4G).
- Distinguish the terms in the options by field — blockchain is a distributed ledger technology, MVNO is a type of telecom carrier, and 8K is a video resolution standard; none of them is a mobile-communication-system standard.
用語