問題文
A procurement team is evaluating whether a hosting arrangement they have been offered really is cloud computing. The vendor requires a support ticket and a two-day wait before any additional server is made available. Which essential characteristic is missing?
選択肢
- Resource pooling, since a shared pool would let the vendor answer immediately and the delay shows that the capacity is still held as separate machines.
- Measured service, because the requirement to file a ticket means that the provider is tracking each request by hand rather than through an automatic metering capability that reports usage back to both parties.
- Broad network access, which the arrangement clearly lacks whenever a request has to be made by hand.
- On-demand self-service, which means the consumer can provision capacity without human interaction with the provider.