問17
頻出度★☆☆
情報システムのサービスを行っている A 社は, B 社に対して表に示す分担で施設や機器などを提供する契約を締結した。A 社が提供するサービスの内容として, 適切なものはどれか。
| 対象となる情報資産 | A社 | B社 |
|---|---|---|
| コンピュータや通信機器を設置する施設 | ○ | |
| 設置するコンピュータや通信機器 | ○ | |
| コンピュータ上で稼働する業務アプリケーション | ○ |
平成21年度 秋期 ITパスポート試験 問17
ストラテジ系システム戦略 › ソリューションビジネス
This question's explanation and your answers so far.
解説
問 17
Incorrectア
With SaaS, the provider supplies even the application software, and the user simply uses those functions over the network. In the table, however, the ○ for the business application is on the Company B (user) side, and Company A does not supply the application. The division of roles is the opposite of SaaS, so this is wrong.
Incorrectイ
Contracted system development is a contract in which Company A designs and develops software at Company B's request and delivers it. What the table shows is a contract for continuously providing facilities and equipment, and there is no item anywhere indicating contracted development or delivery of a deliverable. Moreover, the business application is Company B's responsibility, so this cannot be read as contracted development.
Incorrectウ
In a colocation (housing) service, the provider supplies only the installation site — a facility with earthquake resistance, power, air conditioning, and network lines — while the user brings in and installs its own computers and communication equipment. In the table, the ○ for “Computers and communication equipment to be installed” is also on Company A's side, so this is not colocation, which rents out only the facility.
- エ
正解 The correct answer is “エ Hosting service”. Reading the table column by column, Company A has a ○ on two rows, “Facility where computers and communication equipment are installed” and “Computers and communication equipment to be installed”, so Company A prepares both the location and the hardware and rents them to Company B. Company B, on the other hand, has a ○ only on “Business application running on the computers”; it merely runs its own business application on the rented server. The provider owns and supplies even the equipment such as servers, and the user rents that equipment to run its software — this division of roles is exactly a hosting service (renting out servers, what is commonly called a rental server).
ここがポイント
- The line between colocation (housing) and hosting is “who prepares the equipment”. Renting out only the facility = colocation; renting out the facility plus equipment such as servers = hosting (a rental server).
- The scope of what is provided widens in the order facility → hardware → middleware → application, and once the provider supplies the application as well, it becomes SaaS. Judge the service type by how far up these layers the ○ marks reach on the provider's side of the table.
用語