This document discusses cloud computing and provides a history, taxonomy, advantages, disadvantages, and future outlook. It outlines how cloud services have evolved from application service providers and hosted applications to today's software, platform, and infrastructure as a service models. The key advantages are lower costs and easier access, while disadvantages include loss of control and security/support perceptions. Going forward, the document predicts a shift to greater cloud computing power and less need for local infrastructure, especially with increased mobile usage.

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Cloud Computing
Peter Henley, Senior Director, IT
Clark Nuber, CPA’s

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History
• Application Service Providers (ASP)
• Hosted applications
• Local footprint applications
• Browser based applications
• Software, Platform, Data storage
• Infrastructure

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Taxonomy
Infrastructure Platform as Software as
As a Service A Service A Service
Traditional IT Environment IaaS PaaS Saas
Vendor Applications Applications
Custom Applications Tools Configuration
Data Storage Data Storage Data Storage
Desktops Desktops Browser Browser
Servers Servers Servers Servers

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Advantages
• Fewer capital expenditures
• No software updates
• Less data management
• IT personnel payroll, management, training
• Lower consulting fees
• Easier remote access
• Pay for what you use
• Better security

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Disadvantages
• Higher bandwidth
• Bandwidth redundancy
• Bandwidth high availability
• Router, switch, wiring capex
• Loss of control
• Security perception, due diligence
• Support perception

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Future
• Less local computing power
• Greater cloud computer power
• Less local infrastructure
• Mobile
• “Cloud Plan”
– Resource there now
– Resource will be there in the year 201?
– Resource will never be there
Approaches: One app at a time, all at once