29 Jun ISSC326 Cloud Computing Final Case Study
Question
ISSC326 Cloud Computing Final Case Study Name___________________
1)Fundamental Concepts and Models
Test question (15pts)
Company B
Company B is an IT hosting company that provides a range of shared services used by
a wide variety of customers. One of Company B’s customers is Company A. Specifically,
Company A’s marketing department has been using a service hosted by Company B’s
on-premise environment. The service provides functions for conducting public surveys.
Recently, Company A complained about Company B’s billing practices and the reliability
of its hosting environment. Company B currently charges all of its customers a flat fee,
regardless of how much or how frequently a given customer uses the service.
Furthermore, the public survey service has been repeatedly attacked and has therefore
not always been available for Company A and other customers.
In response to the complaints from Company A, Company B is considering using a
cloud-based hosting platform. Which specific characteristics of a cloud will be helpful to
address Company B’s problems?
2) Fundamental Cloud Security
Test question (15pts)
The diagram below illustrates interaction between two cloud service consumers (A and B) and
two virtual servers (A and B) hosted on a cloud. Based on the limited information provided in the depicted scenarios, list the types of attacks that could
potentially be carried out if any of the programs outside of the cloud were malicious. Provide a brief
explanation justifying the threat of each proposed attack. ISSC326 Cloud Computing Final Case Study Name___________________
3) Infrastructure, Specialized & Management Mechanisms
Test question (20pts) 1. A _________________________ measures the usage of a cloud-based IT resource by a given
cloud consumer for billing purposes.
2. A _________________________ is a database used to temporarily persist state data for
software programs .
3. A _________________________ is a software program that contains mapping logic
capable of transforming message data to and from different data formats.
4. A _________________________ is a form of virtualization software that simulates a
computer that resides on physical server but appears to consumers as an independent server.
5. A _________________________ is a pre-defined cloud-based platform comprised of a set of
already installed IT resources, ready to be used and customized by a cloud consumer.
6. _________________________ is a mechanism used to replicate cloud-based IT resources.
7. An _________________________ monitors and keeps track of communication between cloud
service consumers and cloud services for load balancing purposes.
8. A _________________________ increases reliability and availability by using established
clustering technology to provide redundant implementations of software programs. ISSC326 Cloud Computing Final Case Study Name___________________ 4) Cloud Security Mechanisms
Test question (10pts)
Fill in the blank to indicate which cloud security mechanisms (left) are primarily used to counter
common cloud security threats (right).
A Malicious Intermediary
Encryption is used to
counter____________________
B Denial of Service
Digital Signatures is used to
counter____________________ Identity and Access Management is used
to counter____________________ Single Sign-On is used to
counter____________________ C Insufficient Authorization D Virtualization Attack E Overlapping Trust Boundary Cloud-Based Security Groups is used
to counter____________________ Hardened Virtual Server Images is used
to counter____________________
22 5) Fundamental, Advanced & Specialized Cloud
Architectures
Test question (10pts) 1. The _________________________ architecture results in the creation of pools of IT
resources designed to accommodate concurrent and fluctuating usage.
2. The _________________________ architecture avoids resource constraints that can occur when
IT resources are shared by multiple cloud consumers.
3. The _________________________ architecture results in a system that automates IT
resource provisioning tasks and processes.
4. The _________________________ architecture enables LUNs to be implemented across
different disk types.
5. The _________________________ architecture enables direct access to block base
storage by LUNs. 6) Cloud Delivery Model Considerations
Test question (16)
Select the between IaaS / PaaS / SaaS and give your reasoning.
.
Scenario #1
XYZ is a large real estate firm. Their core competence is their understanding of the real estate
market, and their understanding of their customers and the customer needs. Their most critical tools
are their CRM and email servers. They are growing, and so is their customer list and their IT and
marketing costs are growing at an alarming rate. They currently use managed services to run their
CRM, email, etc software but they have had to deal with significant delays as each growth spurt is
bogged down by the time and cost it takes to provision new servers, install the software, test it and
bring it online. Which cloud delivery model would be best suited for them?
Scenario #2
ABC is a mid-size animation company that has historically worked on some of the major
animation movies in the last few years. Their core competence is their animation engineers, and
their very talented IT staff that manages their server farms and develops new versions of their
custom animation software. When they are working on a particular animation sequence, their
typical development cycle involves large spikes in computing and storage usage, as they render
each section and each version. Over the years, as animations have become more sophisticated,
these spikes have become larger and more unpredictable as they start pushing the boundaries
of what is computationally possible. Consequently, they have seen their hardware and IT costs
increase at a rapid rate in order to service the rendering spikes, while sitting idle the rest of the
time. Which cloud delivery model would be best suited for them? 7) Service Quality Metrics and SLA
Test question (14pts)
Answer the questions.
1. Over the past 3 years, a cloud service has been unavailable for a total of 36 hours, primarily due to
a denial of service attacks. Additionally, the physical server hosting the cloud service crashed once. It
took the cloud provider 4 days to replace the physical server and for the cloud service to become
operational again. Based on these statistics over the past 3 years, what is the availability rating of the
cloud service? 2. A cloud provider is deploying a new SaaS product comprised of a cloud service. As part of the
deployment, the cloud provider wants to publish a service level agreement (SLA) that provides an
availability rating based on its estimated availability over the next 12 months. First, the cloud provider
estimates that, based on historical data of the cloud environment, there is a 25% chance that the
physical server hosting the cloud service will crash and that such a crash would 2 days before the
cloud service could be restored. It is further estimated that, over the course of a 12 month period,
there will be various attacks on the cloud service, resulting in a total of 24 hours of downtime. Based
on these estimates, what is the availability rating of the cloud service that should be published in the
SLA?
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