Introduction to cloud computing

What is cloud computing?

Using remote servers on the Internet to perform tasks instead of own computers or servers.

State three advantages of cloud computing.

• Little or no investment

• More focus on application development

• Requires less workforce

What are the two choices when an application requires a lot of processing?

Buy a server of rent a server.

Why is cloud computing cost-effective?

Pay only for what you use.

List four disadvantages of cloud computing.

• Internet dependency

• Latency issues

• Reduced speed due to shared bandwidth

• Privacy and security concerns

Which model uses a pay-as-you-go model?

Cloud computing.

Which model requires server space?

On-Premise

Which model provides automatic software updates and model offers disaster recovery?

Cloud computing

What are the three deployment models in Cloud Computing?

• Public Cloud

• Private Cloud

• Hybrid Cloud

What is public cloud?

Services provided by third-party providers over the public Internet.

Who own public cloud?

Services provided by third-party providers over the public Internet.

What is private cloud?

Cloud infrastructure dedicated to a single organization.

Which cloud type offers higher security?

Private cloud

What is hybrid cloud?

Combination of private cloud, public cloud, and on-premises resources.

Why is Hybrid cloud more flexible?

It can use public resources during high demand.

What are the three cloud service models?

• IaaS

• PaaS

• SaaS

What does IaaS provide?

Servers, storage, networking, and virtualization.

Who mainly uses IaaS?

System administrators

What does the user control in IaaS?

• Operating System

• Middleware

• Runtime

• Applications

• Data

Who mainly uses PaaS?

Developers

What does the user control in PaaS?

• Applications

• Data

List five characteristics of PaaS.

• Scalability

• Availability

• Manageability

• Performance

• Accessibility

What is scalability?

Ability to increase or decrease resources on demand.

What is performance in PaaS?

Distributing workloads and balancing system load.

What is SaaS?

Software delivered directly to users over the Internet.

Example of SaaS?

Facebook, Dropbox, Slack, Google Apps

State three advantages of SaaS.

• No hardware costs

• Automated upgrades

• Accessible from anywhere

What is middleware?

Software between the operating system and applications.

What is the function of middleware?

Enables communication and data management for distributed applications.