Cloud Computing

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Assessment item 2

Concepts and Models

Value: 15%

Due date: 26-Mar-2015

Return date: 19-Apr-2015

Submission method options

Alternative submission method

Task

Answer each of the questions below:

Describe the difference between a locally hosted service (ie. in an enterprise data centre) and a service provided using an SaaS provider. What are the critical points, other than cost, that an enterprise would need to consider in choosing to migrate from a locally hosted service to an SaaS service. Your description should take no more than two to 3 pages.
Describe the difference between locally hosted infrastructure (ie. in an enterprise data centre) and infrastructure provided using an IaaS provider. What are the critical points, other than cost, that an enterprise would need to consider in choosing to migrate from local hosted infrastructure to an IaaS service provider. Your description should take no more than two to 3 pages.
DTGOV, the department in our case study, wants to investigate moving to a service based model where many of its services would be supplied to its clients as a service, in addition to its plans to move to an IaaS model (See the DTGOV Roadmap and Implementation Strategy (Erl, Mahmood, & Puttini, 2013, p. 19)). There are a number of infrastructure models that could possibly be used to achieve this. Some of these models are:
1. Local hosted infrastructure and applications;
2. Local hosted infrastructure with some SaaS applications;
3. Hybrid infrastructure (some locally hosted infrastructure with some IaaS) and applications;
4. Hybrid infrastructure and applications with some SaaS applications;
5. Full IaaS model with some with SaaS apps;
6. Full SaaS model.

You are required to choose an infrastructure model that you think will achieve the DTGOV Roadmap;

Describe the benefits and drawbacks, excluding costs, of your chosen infrastructure model. Your description should take no more than two to 3 pages.

Online submission via Turnitin is required for this assignment.

Rationale

This assessment will cover the following objectives:

Be able to compare and evaluate the ability of different Cloud Computing Architectures to meet a set of given business requirements;
Be able to evaluate a set of business requirements to determine suitability for a Cloud Computing delivery model;

Marking criteria

Marking Criteria

Question	Marks
Question 1 – Services	10
Question 2 – Infrastructure	10
Question 3 – a. Infrastructure model	15
Question 3 – b. Benefits & drawbacks	15
Total	50
Spelling, grammar & presentation (up to -5 marks)
Referencing (up to -5 marks)

Assessment Rubric

Question	HD	DI	CR	PS	FL
Q1 – Services	Clear, comprehensive description of service differences, critical points identified & discussed	Detailed description of service differences, critical points identified & discussed,	Good description of service differences, some critical points identified & discussed,	Adequate description of service differences, some critical points identified	Incomplete or inadequate description of service differences, none or few critical points identified
Q2 – Infrastructure	Clear, comprehensive description of infrastructure differences, critical points identified & discussed,	Detailed description of infrastructure differences, critical points identified & discussed,	Good description of infrastructure differences, some critical points identified & discussed,	Adequate description of infrastructure differences, some critical points identified	Inadequate or incomplete description of infrastructure differences, none or few critical points identified
Q3a Infrastructure Model	Clear & comprehensive description of infrastructure model choice and reasoning	Detailed description of infrastructure model choice and reasoning	Good description of infrastructure model choice with some reasoning	Adequate description of infrastructure model choice with limited reasoning	Inadequate or incomplete description of infrastructure model choice with no reasoning
Q3b Benefits & Drawbacks	Clear & comprehensive description of infrastructure benefits and drawbacks with reasoning	Detailed description of infrastructure benefits and drawbacks with reasoning	Good description of infrastructure benefits and drawbacks with some reasoning	Adequate description of infrastructure benefits and drawbacks with limited reasoning	Inadequate or incomplete description of infrastructure benefits and drawbacks with no reasoning
Spelling, Grammar, Presentation	Up to 5 marks may be deducted for poor presentation, spelling and grammar
APA referencing	Up to 5 marks may be deducted for not providing or following the proper APA style of referencing. Note that the guide for APA referencing is provided in the Resource Section of the ITC561 Interact site.

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