Cloud deployment models (public, private, hybrid) in AWS - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a public cloud deployment model?

A public cloud is a cloud service offered by providers like AWS to anyone over the internet. Resources like servers and storage are shared among many users, making it cost-effective and easy to scale.

beginner

Define a private cloud deployment model.

A private cloud is a cloud environment used exclusively by one organization. It can be hosted on-premises or by a provider but offers more control and security since resources are not shared with others.

intermediate

What is a hybrid cloud deployment model?

A hybrid cloud combines public and private clouds, allowing data and applications to move between them. This gives flexibility to keep sensitive data private while using public cloud for less critical tasks.

beginner

Which cloud deployment model is best for highly sensitive data?

Private cloud is best for highly sensitive data because it offers exclusive access and stronger control over security.

intermediate

Why might a company choose a hybrid cloud model?

A company might choose hybrid cloud to balance cost and security. They can keep sensitive data in a private cloud and use the public cloud for scaling and less sensitive workloads.

Which cloud model shares resources with multiple users over the internet?

A Hybrid cloud

B Public cloud

C Private cloud

D Community cloud

Public cloud shares resources among many users, making it accessible and cost-effective.

Which cloud model provides exclusive access to one organization?

A Hybrid cloud

B Public cloud

C Private cloud

D Multi-cloud

Private cloud is dedicated to one organization, offering more control and security.

What is a key benefit of a hybrid cloud?

A Unlimited free resources

B No internet connection needed

C Only uses private data centers

D Combines security and scalability

Hybrid cloud allows sensitive data to stay private while using public cloud for scaling.

Which cloud model is usually the most cost-effective for startups?

A Public cloud

B Private cloud

C Hybrid cloud

D On-premises only

Public cloud offers pay-as-you-go pricing and easy access, ideal for startups.

In AWS, which service is commonly used for private cloud-like environments?

A AWS Outposts

B Amazon S3

C Amazon EC2

D AWS Lambda

AWS Outposts extends AWS infrastructure to on-premises for private cloud use.

Explain the differences between public, private, and hybrid cloud deployment models.

Think about who uses the resources and where they are located.

Describe a real-life scenario where a hybrid cloud model would be beneficial.

Consider a company handling private customer data but needing to scale web services.

Practice

1. Which cloud deployment model provides resources shared among many users and is managed by providers like AWS?

easy

A. Community cloud

B. Private cloud

C. Hybrid cloud

D. Public cloud

Solution

1. Step 1: Understand public cloud characteristics

   Public cloud offers shared resources managed by third-party providers like AWS.

2. Step 2: Compare with other models

   Private cloud is dedicated, hybrid combines both, community cloud is shared by organizations with common concerns.

3. Final Answer:

   Public cloud -> Option D

4. Quick Check:

   Shared resources managed by providers = Public cloud [OK]

Hint: Public cloud means shared and managed by providers like AWS [OK]

Common Mistakes:

• Confusing private cloud with public cloud
• Thinking hybrid cloud is fully public
• Mixing community cloud with public cloud

2. Which of the following is the correct description of a private cloud?

easy

A. Cloud resources dedicated to a single organization

B. Cloud resources shared publicly with many users

C. Cloud resources managed by multiple providers

D. Cloud resources only for government use

Solution

1. Step 1: Define private cloud

   Private cloud means resources are dedicated to one organization for better security and control.

2. Step 2: Eliminate incorrect options

   Public sharing is not private, multiple providers relate to hybrid or public, government-only is not a standard model.

3. Final Answer:

   Cloud resources dedicated to a single organization -> Option A

4. Quick Check:

   Dedicated resources = Private cloud [OK]

Hint: Private cloud means dedicated to one organization only [OK]

Common Mistakes:

• Choosing public cloud for private cloud question
• Confusing government-only cloud with private cloud
• Thinking private cloud is shared

3. A company uses a cloud setup where sensitive data is stored on their own servers, but they use AWS public cloud for running web applications. What type of cloud deployment model is this?

medium

A. Hybrid cloud

B. Private cloud

C. Community cloud

D. Public cloud

Solution

1. Step 1: Identify private and public parts

   Sensitive data on own servers means private cloud; web apps on AWS means public cloud.

2. Step 2: Recognize combined model

   Using both private and public clouds together is called hybrid cloud.

3. Final Answer:

   Hybrid cloud -> Option A

4. Quick Check:

   Combination of private and public = Hybrid cloud [OK]

Hint: Mix of private and public cloud is hybrid cloud [OK]

Common Mistakes:

• Choosing only public or private cloud
• Confusing community cloud with hybrid
• Ignoring the mixed usage

4. A company wants to fix an error in their cloud deployment where their private cloud resources are accidentally exposed to the public internet. What is the best immediate action?

medium

A. Switch to a public cloud provider

B. Move all data to a hybrid cloud

C. Review and update firewall and access controls

D. Delete all cloud resources

Solution

1. Step 1: Identify the security issue

   Private cloud resources exposed means access controls or firewall rules are misconfigured.

2. Step 2: Apply correct fix

   Updating firewall and access controls will restrict unwanted public access immediately.

3. Final Answer:

   Review and update firewall and access controls -> Option C

4. Quick Check:

   Fix exposure by access control update [OK]

Hint: Fix exposure by updating firewall and access controls [OK]

Common Mistakes:

• Switching cloud models without fixing security
• Deleting resources unnecessarily
• Moving data without fixing access rules

5. A startup wants to minimize costs but keep sensitive customer data secure. They plan to use AWS public cloud for most services but keep the database on their own servers. Which cloud deployment model fits best and why?

hard

A. Private cloud, because all data stays on own servers

B. Hybrid cloud, because it balances cost and security

C. Public cloud, because it is cheapest and easiest

D. Community cloud, because it shares resources with similar startups

Solution

1. Step 1: Analyze cost and security needs

   Startup wants low cost (public cloud) and secure data (private servers).

2. Step 2: Match deployment model

   Hybrid cloud combines public cloud cost benefits with private cloud security for sensitive data.

3. Final Answer:

   Hybrid cloud, because it balances cost and security -> Option B

4. Quick Check:

   Cost + security balance = Hybrid cloud [OK]

Hint: Hybrid cloud balances cost and security needs [OK]

Common Mistakes:

• Choosing only public cloud ignoring security
• Choosing private cloud ignoring cost
• Confusing community cloud with hybrid