1. TECHNOLOGY GUIDE THREE
Cloud Computing

2. TECHNOLOGY GUIDE OUTLINE
TG3.1 Introduction
TG3.2 What Is Cloud Computing?
TG3.3 Different Types of Clouds
TG3.4 Cloud Computing Services
TG3.5 The Benefits of Cloud Computing
TG3.6 Concerns and Risks with Cloud Computing

3. LEARNING OBJECTIVES
1. Describe the problems that modern information technology departments face.
2. Describe the key characteristics and advantages of cloud computing.
3. Identify a use-case-scenario for each of the four types of clouds.
4. Explain the operational model of each of the three types of cloud services.

4. LEARNING OBJECTIVES 5. Identify the key benefits of cloud computing.
6. Discuss the concerns and risks associated with cloud computing.

5. TG 3.1 Evolution of Modern IT Infrastructure
Stand-alone mainframes
Mainframes and dumb terminals
Stand-alone personal computers
Local area networks
Enterprise computing (wide area networks and the Internet)
Cloud computing and mobile computing

6. Problems Faced by Traditional IT Departments
On-premise computing: a type of IT model where a company owns its IT infrastructure (hardware, software, networks, and data management) and maintains that infrastructure internally (or “on premise”)

7. Problems Faced by Traditional IT Departments (continued)
* Expensive: IT staff, software licenses, hardware * Funds expended on maintaining existing systems rather than on developing new systems
* Can result in a lack of flexibility for the organization to meet rapidly changing business conditions

8. TG 3.2 What Is Cloud Computing?
Cloud computing: a type of computing that delivers convenient, on-demand, pay-as-you-go access for multiple customers to a shared pool of configurable computing resources (servers, networks, storage, applications, and services)

9. Cloud Computing Characteristics
Provides on-demand self service
Encompasses grid computing
Encompasses utility computing
Utilizes broad network access
Pools computing resources
Often occurs on virtualized servers

10. Grid Computing
Grid computing: shares the processing resources of many geographically dispersed computers across a network
Provides fault tolerance and redundancy
Enables companies to scale up and scale down

11. Grid Computing
Grid computing involves applying the resources of many computers in a network to a single problem at the same time.

12. Utility Computing
Utility computing: a service provider makes computing resources and infrastructure management available to customers as needed
Customers pay based on usage, not a flat rate

13. Utility Computing
Utility computing (also called subscription computing and on-demand computing) is when a service provider makes computing resources and infrastructure management available to a customer as needed for a charge based on specific usage rather than a flat rate.

14. Server Farms
Server farms: massive data centers, which may contain hundreds of thousands of networked computer servers

15. Server Virtualization
Server virtualization: uses software-based partitions to create multiple virtual servers – called virtual machines – on a single physical server

16. Organizational server farms in relation to the Internet

17. TG 3.3 Different Types of Clouds
Public cloud: shared, easily accessible, multi-customer IT infrastructure available nonexclusively to any entity in the general public (individuals, groups, and/or organizations)
Private cloud (internal or corporate cloud): IT infrastructures that can be accessed only by a single entity or by an exclusive group of related entities that share the same purpose
Hybrid cloud: composed of public and private clouds that remain unique entities while offering users the benefits of multiple deployment models

18. The Three Types of Clouds

19. TG 3.4 Cloud Computing Services
Infrastructure-as-a-Service: cloud computing vendors offer remotely accessible servers, networks, and storage capacity
Platform-as-a-Service: customers rent servers, operating systems, storage, a database, software development technologies, and network capacity over the Internet
Software-as-a-Service: cloud computing vendors provide software over the Internet that is specific to their customers’ requirements

21. TG 3.5 Benefits of Cloud Computing
Making individuals more productive
Facilitating collaboration
Mining insights from data
Reducing costs
Expand scope of business operations
Respond quickly to market changes
Customize products and services

22. TG 3.6 Risks of Cloud Computing
Legacy IT systems
Reliability
Privacy
Security
Legal and regulatory environment