CLOUD COMPUTING Concepts and Models

Read the DTGOV Case Study before you attempt this assignment 
DTGOV want to migrate some of their webservers to an IaaS instance in AWS to test their strategy. They understand that they need to do a full migration plan first, but they want to determine what sort of architecture would be required to support their web services.
The web services are considered essential by both DTGOV and their users, so any web services must be:

Readily available and accessible at all times
Capable of handling heavy loads in times of peak demand
Capable of serving downloads to users as required
Secure from attacks
Capable of providing reports on usage

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Your task is to prepare an initial PowerPoint briefing for the DTGOV board. Your briefing should discuss:

Initial Webserver trial:                                                                                                                            (30 marks)

Explain how the selected DTGOV webservers will work in       an IaaS instance in the AWS Cloud environment and how will this move       affect users of these web services. You should also explain if you think       the users will benefit from this move, and why they will benefit, or not;
Explain the types of Cloud Architectures that you       think would be useful for DTGOV to use as part of their webserver       infrastructure in the Cloud.  This explanation should also briefly       discuss how the current DTGOV infrastructure could be replicated or       replaced in a Cloud deployment.
You do not need to talk to security of the       infrastructure or webservers in this briefing.

Office 365:                                                                                                                                                        (30 marks)

Many of DTGOV’s customers want to provide all their       staff with the ability to access office automation, such as email, word       processing and spreadsheet capabilities, as well as online storage for       their files, whether they are in the office,   at home, or working       at a remote site in the field.  The DTGOV board is very concerned to       learn about the critical issues, other than cost, that may affect the       supply of Cloud based office automation to their customers’ staff.        You will need to prepare a briefing on the best way to provide       office automation for DTGOV customers.  Your presentation should:

Discuss the benefits and issues that DTGOV customers,        and their users, would achieve from moving to Office 365 as their office        automation suite.
Describe how a cloud-based approach will differ from        providing this suite from an on-premise data centre.

SharePoint:                                                                                                                                                       (40 marks)

DTGOV is also considering whether to use PaaS or SaaS       to provide some services to specific customers. DTGOV has deployed       Microsoft SharePoint 2010 from its data centre as a collaboration and       document management tool. The SharePoint 2010 instance has been       extensively customised to suit DTGOV requirements and deploys Project       Central, their Project Management tool as a separate application from       within SharePoint. DTGOV would like to move its SharePoint 2010 instance       to the cloud to make it more available to more customers, particularly       those at remote sites. DTGOV wants you to report on:

What are the major differences between the models        IaaS, PaaS and SaaS? (10 marks)
Recommend the model that you consider most        appropriate for this service and discuss why this model is the most        appropriate for the SharePoint service. (15 marks)
What are the most likely problems that DTGOV will        encounter with the model that you recommend? How would you advise DTGOV        to deal with these issues? (15 marks)

Each slide in the briefing must also include speaking notes in the notes section to explain the slide, and all images used in the briefing should be referenced.

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