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

Recall & Review

beginner

What is a public cloud?

A public cloud is a cloud service offered by providers like Azure to anyone over the internet. It shares resources among many users and is cost-effective and scalable.

beginner

Define private cloud in simple terms.

A private cloud is a cloud environment used only by one organization. It can be on their own servers or hosted by a provider but is not shared with others, offering more control and security.

beginner

What is a hybrid cloud?

A hybrid cloud combines public and private clouds. It lets organizations keep sensitive data private while using public cloud for less sensitive tasks, balancing security and flexibility.

intermediate

Why might a company choose a private cloud over a public cloud?

A company might choose a private cloud for better security, control over data, and compliance with regulations, even if it costs more than a public cloud.

intermediate

Give an example of how a hybrid cloud can be used.

An example is a company storing sensitive customer data in a private cloud while running their website and apps on a public cloud to handle traffic spikes easily.

Which cloud deployment model shares resources with multiple organizations over the internet?

A Public cloud

B Private cloud

C Hybrid cloud

D Community cloud

Public cloud shares resources among many users over the internet.

Which cloud model offers the most control and security for a single organization?

A Private cloud

B Multi-cloud

C Hybrid cloud

D Public cloud

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

What is a key benefit of a hybrid cloud?

A Requires no management

B Only uses public cloud resources

C Is always cheaper than other models

D Combines public and private clouds for flexibility

Hybrid cloud combines public and private clouds to balance security and flexibility.

Which cloud deployment model is best for handling sensitive data with strict compliance needs?

A Public cloud

B Private cloud

C Hybrid cloud

D Community cloud

Private cloud is preferred for sensitive data and compliance.

In Azure, which service is an example of a public cloud offering?

A Azure Virtual Network

B Azure DevOps Server

C Azure App Service

D Azure Stack Hub

Azure App Service is a public cloud platform service.

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

Think about who uses the resources and how data is managed.

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

Consider a company with strict data rules but variable app traffic.

Practice

1. Which cloud deployment model is shared among multiple organizations and accessible over the internet?

easy

A. Public cloud

B. Private cloud

C. Hybrid cloud

D. Community cloud

Solution

1. Step 1: Understand public cloud characteristics

   Public cloud resources are shared and accessible to many users over the internet.

2. Step 2: Compare with other models

   Private cloud is dedicated to one organization; hybrid mixes both. Community cloud is shared by a specific group, not open to all.

3. Final Answer:

   Public cloud -> Option A

4. Quick Check:

   Shared and open = Public cloud [OK]

Hint: Shared and open means public cloud [OK]

Common Mistakes:

• Confusing private cloud as shared
• Thinking hybrid 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 shared publicly over the internet

B. Cloud infrastructure dedicated to a single organization

C. Combination of public and private clouds

D. Cloud services managed by a third-party for multiple organizations

Solution

1. Step 1: Define private cloud

   Private cloud means cloud infrastructure is dedicated to one organization only.

2. Step 2: Eliminate other options

   Public cloud is shared publicly, hybrid is a mix, and third-party managed multi-org is community or public cloud.

3. Final Answer:

   Cloud infrastructure dedicated to a single organization -> Option B

4. Quick Check:

   Dedicated to one org = Private cloud [OK]

Hint: Dedicated to one organization means private cloud [OK]

Common Mistakes:

• Choosing public cloud for private cloud definition
• Confusing hybrid cloud with private cloud
• Thinking third-party management means private cloud

3. A company uses a cloud setup where sensitive data is stored on their own servers, but they use public cloud services for less critical workloads. What type of cloud deployment model is this?

medium

A. Public cloud

B. Private cloud

C. Hybrid cloud

D. Community cloud

Solution

1. Step 1: Analyze the setup

   Sensitive data on private servers means private cloud; less critical workloads on public cloud means public cloud.

2. Step 2: Identify the combined model

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

3. Final Answer:

   Hybrid cloud -> Option C

4. Quick Check:

   Mix of private and public = Hybrid cloud [OK]

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

Common Mistakes:

• Choosing private cloud only
• Confusing community cloud with hybrid
• Selecting public cloud ignoring private part

4. Identify the error in this cloud deployment description: "A hybrid cloud stores all data on public cloud servers but uses private cloud for running applications."

medium

A. Hybrid cloud cannot use public cloud servers

B. Private cloud cannot run applications

C. Hybrid cloud must use community cloud services

D. Data storage and application hosting roles are reversed

Solution

1. Step 1: Understand hybrid cloud roles

   Hybrid cloud mixes private and public clouds, typically sensitive data is kept private, apps can run anywhere.

2. Step 2: Spot the reversed roles

   The description says all data is on public cloud but apps run on private cloud, which is unusual and reversed from best practice.

3. Final Answer:

   Data storage and application hosting roles are reversed -> Option D

4. Quick Check:

   Data usually private, apps flexible = Roles reversed [OK]

Hint: Data usually private, apps flexible in hybrid [OK]

Common Mistakes:

• Thinking hybrid can't use public cloud
• Believing private cloud can't run apps
• Confusing community cloud with hybrid

5. A company wants to keep customer financial data highly secure on their own servers but also wants to quickly scale their website traffic using cloud resources. Which deployment model should they choose and why?

hard

A. Hybrid cloud, because it combines secure private storage with scalable public resources

B. Private cloud, because it allows unlimited scaling without sharing resources

C. Public cloud, because it offers the best security for financial data

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

Solution

1. Step 1: Identify security needs

   Financial data needs high security, best kept on private servers.

2. Step 2: Identify scaling needs

   Website traffic can be handled by scalable public cloud resources.

3. Step 3: Match deployment model

   Hybrid cloud combines private security with public scalability, fitting both needs.

4. Final Answer:

   Hybrid cloud, because it combines secure private storage with scalable public resources -> Option A

5. Quick Check:

   Secure + scalable = Hybrid cloud [OK]

Hint: Secure data + scale = hybrid cloud [OK]

Common Mistakes:

• Choosing public cloud for sensitive data
• Assuming private cloud scales unlimited
• Confusing community cloud with hybrid