IS312 - PlugIT- 4 - Cloud Computing

Characteristics of cloud computing

-Provides On-Demand Self- Service -Encompasses the Characteristics of Grid Computing -Encompasses the Characteristics of Utility Computing -Utilizes Broad Network Access -Pools Computing Resources -Often Occurs on Virtualized Servers

7 benefits of cloud computing

B.0.enefit 1: Making Individuals More Productive Benefit 2: Facilitating Collaboration Benefit 3: Mining Insights from Data Benefit 4: Reduce Costs Benefit 5: Expand the Scope of Business Operations Benefit 6: Respond Quickly to Market Changes Benefit 7: Customize Products and Services

6 Concerns with Cloud computing

Concern 1: Legacy IT Systems Concern 2: Reliability Concern 3: Privacy Concern 4: Security Concern 5: The Regulatory and Legal Environment Concern 6: Criminal Use of Cloud Computing

3 types of cloud computing services

Infrastructure-as-a-Service (IaaS): cloud computing providers offer remotely accessible servers, networks, and storage capacity. They supply these resources on demand from their large resource pools, which are located in their data centers. Platform-as-a-Service (PaaS): customers rent servers, operating systems, storage, a database, software development technologies such as Java and .NET, and network capacity over the Internet. The PaaS model allows the customer both to run existing applications and to develop and test new applications. Software-as-a-Service (SaaS): cloud computing vendors provide software that is specific to their customers' requirements. SaaS is the most widely utilized service model, and it provides a broad range of software applications. SaaS providers typically charge their customers a monthly or yearly subscription fee. SaaS applications reside in the cloud instead of on a user's hard drive or in a data center.

4 Types of clouds

Public Clouds: shared, easily accessible, multi-customer IT infrastructures that are available nonexclusively to any entity in the general public (individuals, groups, and/or organizations). Public cloud vendors provide applications, storage, and other computing resources as services over the Internet. Private Clouds: (also known as internal clouds or corporate clouds) IT infrastructures that can be accessed only by a single entity or by an exclusive group of related entities that share the same purpose and requirements, such as all of the business units within a single organization. Private clouds provide IT activities and applications as a service over an intranet within an enterprise. Enterprises adopt private clouds to ensure system and data security. For this reason these systems are implemented behind the corporate firewall. Hybrid Clouds: composed of public and private clouds that remain unique entities, but are nevertheless tightly integrated. This arrangement offers users the benefits of multiple deployment models. Hybrid clouds deliver services based on security requirements, the mission-critical nature of the applications, and other company-established policies. Vertical Clouds: cloud infrastructure and applications built for different businesses—the construction, finance, or insurance businesses, for example—thus building vertical clouds.

Six Stages of Modern IT Infrastructure Evolution Make this into 6 cards

Six Stages of Modern IT Infrastructure Evolution 1. Stand-alone Mainframes: Organizations initially used mainframe computers in their engineering and accounting departments. The mainframe was typically housed in a secure area, and only MIS personnel had access to it. 2. Mainframe & Dumb Terminals: Forcing users to go to wherever the mainframe was located was time consuming and inefficient. As a result, firms began placing so-called "dumb terminals"—essentially electronic typewriters with limited processing power—in user departments. This arrangement enabled users to input computer programs into the mainframe from their departments, a process called remote job entry. 3. Stand-alone Personal Computers: In the late 1970s, the first personal computers appeared. The IBM PC's debut in 1981 legitimized the entire personal computer market. Users began bringing personal computers to the workplace to improve their productivity—for example, by using spreadsheet and word processing applications. These computers were not initially supported by the firm's MIS department. However, as the number of personal computers increased dramatically, organizations decided to support these devices, and they established policies as to which PCs and soft ware they would support. 4. Local Area Networks: (client/server computing). When personal computers are networked, individual productivity is substantially increased. For this reason, organizations began to connect personal computers into local area networks (LANs) and then connect these LANs to the mainframe, a type of processing known as client/server computing. 5. Enterprise Computing: In the early 1990s, organizations began to use networking standards to integrate different kinds of networks throughout the firm, thereby creating enterprise computing. As the Internet became widespread after 1995, organizations began using the TCP/IP networking protocol to integrate different types of networks. All types of hardware were networked, from mainframes to personal computers to smartphones. Soft ware applications and data could now flow seamlessly throughout the enterprise and between organizations. 6. Cloud Computing and Mobile Computing: Today, organizations and individuals can use the power of cloud computing. As you will see in this Plug IT In, cloud computing provides access to a shared pool of computing resources, including computers, storage, applications, and services, over a network, typically the Internet.

Benefits of Web Services

The organization can utilize the existing Internet infrastructure without having to implement any new technologies. Organizational personnel can access remote or local data without having to understand the complexities of this process. The organization can create new applications quickly and easily.

Web Services and Service-Oriented Architecture

Web services Benefits of Web Services Service-oriented Architecture Four Key Protocols of Web Services Extensible Markup Language (XML) Hypertext Markup Language (HTML) HTML5

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 (e.g., servers, networks, storage, applications, and services) that can be rapidly and easily accessed over the Internet. Cloud computing allows customers to acquire resources at any time and then delete them the instant they are no longer needed. ELASTICITY Cost vs control