フリー問題

問題文

Staff at a city government request extra virtual servers from a web portal at any hour and the servers appear minutes later with no ticket and no operator involved. Which essential characteristic does the scenario illustrate?

選択肢

1. The scenario illustrates measured service because the consumer starts the usage report alone and the provider performs no flat rate invoices during provisioning.
2. The scenario illustrates self service because the consumer starts the server request alone and the provider performs no manual approval process during provisioning.
3. The scenario illustrates rapid elasticity because the consumer starts the capacity change alone and the provider performs no fixed size review during provisioning.
4. The scenario illustrates resource pooling because the consumer starts the tenant loads alone and the provider performs no dedicated host maps during provisioning.