問94
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NTP の利用によって実現できることとして, 適切なものはどれか。
令和元年度 秋期 ITパスポート試験 問94
テクノロジ系ネットワーク › 通信プロトコル
This question's explanation and your answers so far.
解説
問 94
Incorrectア
The automatic version upgrade of the OS is handled by the OS update feature or a distribution service (such as Windows Update); it is not the role of NTP, which is a time synchronization protocol.
Incorrectイ
Configuring the BIOS is a task performed on the firmware setup screen when the PC starts up, and has nothing to do with NTP, which performs time synchronization over the network.
- ウ
正解 NTP (Network Time Protocol) is a protocol for synchronizing the internal clocks of devices such as PCs and servers connected to a network with a time server that holds an accurate reference time. Therefore, choice ウ, which achieves “time synchronization of devices such as PCs and servers”, is correct. Keeping the time aligned across all devices allows tasks such as chronological matching of logs and judging the validity periods of certificates and authentication to be carried out correctly.
Incorrectエ
Remote startup of a PC over the network is achieved by mechanisms such as Wake on LAN (WoL); NTP, which aligns the time, cannot perform startup control.
ここがポイント
- NTP is a protocol that synchronizes the time of devices on a network with a reference server, and its purpose is accurate time alignment.
- Time synchronization is important because it is a prerequisite for chronological matching of logs and for security (judging the validity periods of certificates and authentication).
用語