問74
頻出度★★☆
サーバ仮想化の特長として, 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74
テクノロジ系システム構成要素 › システムの構成
This question's explanation and your answers so far.
解説
問 74
- ア
正解 Server virtualization is a technology that builds multiple virtual servers (virtual machines) on a single physical computer, making one computer operate as if it were multiple servers. Because physical resources (CPU, memory, storage, etc.) can be flexibly reallocated to each virtual server according to demand, it enables effective use of resources and consolidation of the number of machines (server consolidation). Choice ア correctly states this characteristic and is the correct answer.
Incorrectイ
Increasing or decreasing the number of units by inserting blades that have computer functions into a chassis is a characteristic of a “blade server”, not virtualization. It is a configuration based on physically inserting and removing blades (boards), which is different from virtualization that makes a single machine appear as multiple machines.
Incorrectウ
This describes using a server standalone without connecting it to other servers to raise security, which is a matter of network-level isolation. It is not a characteristic of virtualization; on the contrary, virtualization is a technology that consolidates multiple servers onto a single physical machine, and it does not aim at “not connecting”.
Incorrectエ
Having multiple computers execute the same processing and compare the results to raise reliability is a characteristic of redundant, fault-tolerant configurations such as a “dual system”. This is not virtualization but a description of multiplexing aimed at improving availability and reliability.
ここがポイント
- Server virtualization = a technology that makes a single physical computer operate as multiple virtual servers and flexibly allocates and consolidates physical resources according to demand.
- Distinguishing it from similar concepts: a blade server (increasing/decreasing physical blades), standalone use (security through isolation), and a dual system (improving reliability by comparing identical processing) are all technologies separate from virtualization.
用語