Cloud Provider X has deployed a virtualization environment in Cloud X comprised of
Physical Server A hosting Virtual Servers A and B.
Cloud Provider X implements Cloud
Service A on Virtual Server A and makes it available to Cloud Service Consumer A, which
interacts with Cloud Service A by sending and receiving messages (1, 2).
Cloud Provider Y has deployed a virtualization environment comprised of Physical Server B
hosting Virtual Servers C and D.
Virtual Server C is made available to Cloud Service
Consumer B, which interacts with Virtual Server C (3,4) in order to prepare for the
deployment of a new cloud service that will be used internally by Cloud Provider Y to
process data obtained from Cloud Service A.

Cloud X is administered by a group of organizations and makes Cloud Service A available
only to cloud service consumers from that group. Cloud Consumer Z belongs to one of the
organizations within this group. Cloud Y and Cloud Consumer Z are owned by the same
organization. Which of the following statements provides a valid scenario that accurately
describes the involvement of cloud deployment models, cloud delivery models, roles and/or
boundaries? (Note that the correct answer represents one of multiple valid scenarios that
can exist.)

• A. Cloud X is based on the community cloud deployment model. Cloud Service A is based
  on the SaaS delivery model. Cloud Y is based on the private cloud deployment model.
  Virtual Server C is being offered as part of the IaaS delivery model. A cloud resource
  administrator working for Cloud Consumer Z uses Cloud Service Consumer B to access
  Virtual Server C.
  Cloud Consumer Z is the cloud service owner of Cloud Service A.
  Cloud Consumer T's organizational boundary encompasses Cloud Service Consumers A and B.
  Cloud Consumer Z's trust boundary encompasses Cloud Service A and Virtual Server C.
• B. Cloud X is based on the hybrid cloud deployment model. Cloud Service A is based on
  the SaaS delivery model. Cloud Y is based on the community cloud deployment model.
  Virtual Server C is being offered as part of the IaaS delivery model. A cloud resource
  administrator working for Cloud Consumer Z uses Cloud Service Consumer A to access
  Cloud Service A.
  Cloud Consumer Z's organizational and trust boundaries encompass
  Cloud Service Consumers A and B, Cloud Service A and Virtual Server C.
• C. Cloud X is based on the community cloud deployment model. Cloud Service A is based
  on the SaaS delivery model. Cloud Y is based on the private cloud deployment model.
  Virtual Server C is being offered as part of the IaaS delivery model. A cloud resource
  administrator working for Cloud Consumer Z uses Cloud Service Consumer B to access
  Virtual Server C.
  Cloud Consumer Z' s trust boundary encompasses Cloud Service
  Consumers A and B, as well as Cloud Service A and Virtual Server C.
  The organization
  that owns Cloud Consumer Z will be the cloud service owner of the new cloud service that
  will be deployed on Virtual Server C.
• D. Clouds X and Y are based on the community cloud deployment model. Cloud Service A
  is based on the SaaS delivery model. Virtual Server C is being offered as part of the PaaS
  delivery model. A cloud resource administrator working for Cloud Provider X uses Virtual
  Server A to access the Cloud Service A implementation Cloud Consumer T s trust
  boundary encompasses Cloud Service Consumers A and B, Cloud Service A and Virtual
  Server C.
  The organization that owns Cloud Consumer Z is the cloud service owner of
  Cloud Service A.

The cloud service owner of Cloud Service A is evaluating Clouds X, Y and Z to determine
which cloud environment can offer the greatest level of reliability. All three clouds are
geographically dispersed across three separate time zones. As a result, each cloud
experiences usage peaks at different times. Based on the metrics provided, the greater the
usage of a cloud, the lower its reliability. When the cloud service owner complains to Cloud
Provider A (the owner of all three clouds) that none of the clouds provide an adequate level
of reliability, Cloud Provider A suggests a solution that increases resiliency.

Which of the following statements accurately describes a solution that can be used to fulfill
the resiliency requirements of Cloud Service A?

• A. Redundant implementations of Cloud Service A are deployed in all three clouds. The
  failover system mechanism and a special type of automated scaling listener mechanism
  are implemented to establish a system whereby one redundant Cloud Service A
  implementation will automatically take over from another.
• B. A cloud balancing solution is established, whereby a resource replication mechanism is
  implemented on each cloud. This allows Cloud Service A to be automatically replicated
  across cloud environments, thereby enabling each implementation of Cloud Service A to
  take the place of another, whenever failure conditions occur.
• C. A cloud balancing solution is established, whereby an automated scaling listener
  mechanism is implemented on each cloud in such a way that every cloud can automatically
  scale out to another cloud. As a result, if reliability problems occur on any one cloud, the
  subsequent requests will be scaled out to another cloud in a manner that is transparent to
  cloud service consumers.
• D. A failover system mechanism is implemented on Cloud X, which acts as the primary
  point of contact for cloud service consumers. Upon failure conditions occurring, the Cloud
  Service A implementation on Cloud X automatically hands over control of current and
  future message requests from cloud service consumers to Cloud Y.
  Cloud Y retains control of cloud service consumer communication until the next failure condition occurs, at which
  point it hands over control to Cloud Z.
  Finally, if a failure condition occurs in Cloud Z.control is handed back to Cloud X.

Organization A has been expanding and, as a result, is outgrowing the processing capacity
of its on-premise Service A implementation. It is determined that this is due to usage
thresholds of Service A and complex data processing limitations in Database A.
The diagram depicts Organization A's current on-premise environment, where Service
Consumers A.
B and C attempt to access Service A at the same time. Service Consumer A
successfully accesses Service A, which then successfully retrieves the requested data (1).
Service Consumer B successfully accesses Service A, but due to the complex data
structure, the request for the data times out and fails (2). Finally, Service Consumer C
attempts to access Service A, but is rejected because Service A is unable to accept more
concurrent requests.

Organization A is required to continue using its on-premise Service A implementation, with
the exception of Database A, which does not need to remain on-premise. Database A is
dedicated to Service A and is comprised of relational data. Which of the following
statements provides a solution that uses cloud-based IT resources to solve the
performance limitations of Service A and Database A?

• A. A failover system can be implemented in a hybrid architecture comprised of
  Organization A's existing on-premise environment and a public cloud environment. The
  failover system would span both environments so that when Service A is unable to process
  request messages from Service Consumers A, B or C, the failover system can
  automatically route messages to a redundant implementation of Service A residing in the
  public cloud. Similarly, when Database A is unable to process a data access request from
  Service A.the failover system can automatically route this request to a redundant
  implementation of Database A, also residing in the public cloud.
• B. A cloud bursting solution can be implemented, whereby a redundant copy of Service A
  is implemented within a public cloud. This cloud-based, redundant implementation of
  Service A is referred to as Cloud Service A.
  A copy of Database A is also implemented within the cloud and both the on-premise and cloud-based copies of Database A are
  redesigned to be non-relational in order to improve data access performance. Service A
  continues to act as a first point of contact for Service Consumers A, B and C.
  An automated scaling listener is deployed so that when Service A's thresholds are met,
  requests are automatically routed to Cloud Service A.
• C. The state management database and resource replication mechanisms can be
  implemented to establish redundant implementations of Service A and Database A in both
  on-premise and cloud environments. Using resource replication, a cloud-based duplicate of
  Service A (Cloud Service A) will be established in a public cloud and will remain in synch
  with Service A via regular replication cycles. Using the resource replication mechanism
  together with the state management database mechanism allows for Database A to be
  dynamically replicated in an independent state management database that has redundant
  implementations in both on-premise and cloud environments. The state management
  database can be further optimized to support non-relational data to improve data access
  performance.
• D. None of the above