問86
頻出度★★★
店内に設置した多数のネットワークカメラから得たデータを, インターネットを介して IoT サーバに送信し, 顧客の行動を分析するシステムを構築する。このとき, IoT ゲートウェイを店舗内に配置し, 映像解析処理を実行して映像から人物の座標データだけを抽出することによって, データ量を減らしてから送信するシステム形態をとった。このようなシステム形態を何と呼ぶか。
令和3年度 ITパスポート試験 問86
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 86
Incorrectア
MDM (Mobile Device Management) is a mechanism for centrally managing business mobile devices such as smartphones and tablets, distributing settings and enforcing security controls. It is not a mechanism that processes data on site to reduce the amount sent, so it is incorrect.
Incorrectイ
SDN (Software-Defined Networking) is a technology that centrally manages the control functions of network devices via software, so that routes and configurations can be changed flexibly. It is about network control, not a mechanism that analyzes video at the edge to reduce the data volume, so it is incorrect.
- ウ
正解 The correct answer is “ウ Edge computing.” Edge computing means placing processing equipment near the site where data is generated (the edge), finishing the computation there, and sending only the necessary results up to a higher-level server or the cloud. In this question, the IoT gateway placed inside the store performs video analysis and extracts only the coordinate data of people rather than the video itself, thereby reducing the amount of data before sending. Distributing processing to the edge side reduces communication volume, speeds up responses, and eases server load, which matches the idea of edge computing exactly.
Incorrectエ
A duplex system is a configuration for improving reliability by preparing two systems, an active system and a standby system, and switching to the standby system to continue processing when a failure occurs. It is about a redundant configuration that raises availability, unrelated to a mechanism that processes data on site to reduce the amount sent, so it is incorrect.
ここがポイント
- Edge computing = a method that performs processing near the data source (the edge), and sends only the necessary results, thereby reducing communication volume, lowering latency, and easing server load. Preprocessing on an IoT gateway is a typical example.
- Distinguishing the confusing acronyms: MDM = mobile device management, SDN = centrally controlling the network via software, duplex system = an active/standby redundant configuration. Each has a different purpose.
用語