Using a cloud computing service is simple and straightforward. One can choose the instance with desired specification, finish payment and then use it right away. Moreover, the underlying physical machines are managed by cloud service providers and transparent to users.
Correct answer: A
A/An _________________ is a copy of data on a disk at a certain point in time.
Correct answer: B
Multiple lower-configuration I/O-optimized ECS instances can be used with ___________ to deliver a high-availability architecture.