Question

A company is launching a critical business application in an AWS Region.

How can the company increase resilience for this application?

A. Deploy a copy of the application in another AWS account.
B. Deploy the application by using multiple VPCs.
C. Deploy the application by using multiple subnets.
D. Deploy the application by using multiple Availability Zones.

Answer

D. Deploy the application by using multiple Availability Zones.

Explanation 1

The correct answer is D. Deploy the application by using multiple Availability Zones.

Availability Zones are isolated geographic locations within an AWS Region. Each Availability Zone has its own independent power, cooling, and networking infrastructure. This means that if there is an outage in one Availability Zone, the other Availability Zones will not be affected.

By deploying the application across multiple Availability Zones, the company can increase the resilience of the application. If one Availability Zone goes down, the application will still be available in the other Availability Zones.

The other options are not as effective in increasing the resilience of the application.

• Option A: Deploying a copy of the application in another AWS account would not increase the resilience of the application. If the AWS Region goes down, both copies of the application would be unavailable.
• Option B: Deploying the application by using multiple VPCs would not increase the resilience of the application. VPCs are logical networks within an AWS Region. They are not isolated from each other, so if one VPC goes down, the other VPCs will also be affected.
• Option C: Deploying the application by using multiple subnets would not increase the resilience of the application. Subnets are logical divisions within a VPC. They are not isolated from each other, so if one subnet goes down, the other subnets will also be affected.

Therefore, the best way to increase the resilience of a critical business application in an AWS Region is to deploy the application across multiple Availability Zones.

Explanation 2

To increase resilience for a critical business application in an AWS Region, the company should deploy the application by using multiple Availability Zones. The correct answer is option D.

Explanation:
Availability Zones (AZs) are physically separate data centers within an AWS Region. They are designed to be isolated from failures in other Availability Zones. Deploying the application across multiple Availability Zones provides redundancy and fault tolerance, ensuring that if one Availability Zone experiences an outage or disruption, the application can continue running in other Availability Zones.

By distributing the application across multiple Availability Zones, the company can achieve a higher level of resilience and reduce the risk of downtime. AWS provides a Service Level Agreement (SLA) for each Region, which guarantees a certain level of availability for services deployed across multiple Availability Zones.

Option A, deploying a copy of the application in another AWS account, is not the best approach to increase resilience. While it may provide some level of isolation, it does not take advantage of the built-in redundancy and fault tolerance capabilities provided by AWS Availability Zones.

Option B, deploying the application by using multiple VPCs (Virtual Private Clouds), is not the most suitable answer either. While multiple VPCs can be used for isolation and security purposes, they do not inherently provide the same level of resilience as deploying across multiple Availability Zones.

Option C, deploying the application by using multiple subnets, is also not the most effective solution for increasing resilience. While using multiple subnets within a VPC can provide some level of fault tolerance, it does not offer the same level of redundancy and isolation as deploying across multiple Availability Zones.

In summary, deploying the application by using multiple Availability Zones is the recommended approach to increase resilience in an AWS Region. It provides redundancy, fault tolerance, and improved availability for critical business applications.

Explanation 3

The correct answer is D. Deploy the application by using multiple Availability Zones.

When launching a critical business application in an AWS Region, increasing resilience is essential to ensure high availability and fault tolerance. AWS provides multiple mechanisms to achieve this, but the most effective approach is deploying the application across multiple Availability Zones (AZs).

Availability Zones are physically separate data centers within the same AWS Region. They are designed to be isolated from each other in terms of power, networking, and other infrastructure components. By deploying your application across multiple AZs, you can protect it from failures that might affect a single data center.

Here’s a comprehensive explanation of why the other options are not as suitable:

A. Deploy a copy of the application in another AWS account:
Deploying a copy of the application in another AWS account might provide some level of isolation, but it doesn’t inherently provide resilience. It also introduces complexity in managing multiple AWS accounts and might not fully address issues related to data consistency and latency.

B. Deploy the application by using multiple VPCs:
While using multiple VPCs could potentially offer isolation and segmentation benefits, it doesn’t directly address the issue of increasing resilience. Resilience is more about ensuring your application can survive failures of individual components, which can be better achieved through Availability Zones.

C. Deploy the application by using multiple subnets:
Deploying across multiple subnets is a common practice within a single Availability Zone for segmenting network traffic. However, it doesn’t provide the same level of fault tolerance as deploying across multiple Availability Zones. A single AZ failure could still impact all subnets within it.

D. Deploy the application by using multiple Availability Zones:
This is the correct choice. Deploying across multiple Availability Zones ensures that your application remains operational even if one Availability Zone experiences an outage. AWS provides high-speed, low-latency connectivity between Availability Zones within the same Region, making it a highly reliable and recommended approach for increasing resilience.

In conclusion, to increase resilience for a critical business application in an AWS Region, deploying the application across multiple Availability Zones is the most effective and reliable strategy. This approach ensures high availability, fault tolerance, and minimal downtime in case of infrastructure failures.

Explanation 4

The correct answer is D. Deploy the application by using multiple Availability Zones.

Availability Zones are distinct locations within an AWS Region. They are isolated from each other by different physical infrastructure, such as power grids, cooling systems, and networking. This means that if there is an outage in one Availability Zone, the application will still be available in the other Availability Zones.

Deploying an application across multiple Availability Zones is a best practice for increasing the resilience of the application. This is because it reduces the risk of the application being unavailable due to a regional outage.

The other answer choices are not as effective in increasing the resilience of the application.

• Option A: Deploying a copy of the application in another AWS account does not provide any additional resilience, as both accounts are still in the same Region.
• Option B: Deploying the application by using multiple VPCs does not provide any additional resilience, as VPCs are still within the same Region.
• Option C: Deploying the application by using multiple subnets does not provide any additional resilience, as subnets are still within the same Availability Zone.

Therefore, the correct answer is D. Deploy the application by using multiple Availability Zones.

Explanation 5

To increase resilience for a critical business application in an AWS Region, the company can consider the following options:

A. Deploy a copy of the application in another AWS account:
While this option can provide some level of redundancy, it may not be the most effective way to increase resilience. Deploying a copy of the application in another AWS account does not automatically ensure that the application will be available in both accounts in case of an outage or disaster. Additionally, managing and maintaining multiple instances of the application can be complex and may lead to higher costs.

B. Deploy the application by using multiple VPCs:
Using multiple VPCs can provide some level of resilience by isolating the application from other resources in the same VPC. However, this approach may not be sufficient for highly critical applications, as it does not ensure that the application will be available in case of an outage or disaster affecting one of the VPCs.

C. Deploy the application by using multiple subnets:
Deploying the application across multiple subnets can provide some level of resilience by isolating the application from other resources in the same subnet. However, this approach may not be sufficient for highly critical applications, as it does not ensure that the application will be available in case of an outage or disaster affecting one of the subnets.

D. Deploy the application by using multiple Availability Zones:
Deploying the application across multiple Availability Zones can provide a high level of resilience, as it ensures that the application will be available even if one Availability Zone experiences an outage or disaster. By using multiple Availability Zones, the company can ensure that the application is load-balanced across the different zones, which can help to distribute traffic and reduce the risk of a single point of failure.

Therefore, the most effective way to increase resilience for a critical business application in an AWS Region is to deploy the application across multiple Availability Zones. This approach ensures that the application will be available even if one Availability Zone experiences an outage or disaster, and can help to minimize the impact of any disruptions on the application.

Explanation 6

The correct answer to this question is D. Deploy the application by using multiple Availability Zones. This is because Availability Zones are isolated locations within an AWS Region that have their own power, cooling, and network connectivity. By deploying the application across multiple Availability Zones, the company can increase resilience by reducing the impact of failures or disruptions in one zone. The application can continue to operate from other zones that are unaffected by the issue.

The other options are not correct because:

A. Deploying a copy of the application in another AWS account does not increase resilience, as it does not address the availability of the application within a region. The company would still need to deploy the application across multiple Availability Zones in each account to achieve high availability.

B. Deploying the application by using multiple VPCs does not increase resilience, as it adds complexity and overhead to the network configuration. A VPC is a virtual network that is logically isolated from other networks in AWS. The company can use a single VPC with multiple subnets and Availability Zones to deploy the application.

C. Deploying the application by using multiple subnets does not increase resilience, as it does not account for the physical infrastructure of AWS. A subnet is a segment of a VPC that can span one or more Availability Zones. The company can use multiple subnets within an Availability Zone, but it still needs to deploy the application across multiple Availability Zones to increase resilience.

Explanation 7

In the context of ensuring resilience for an application in the AWS ecosystem, the best practice would be to deploy the application across multiple Availability Zones (Option D).

Availability Zones represent isolated locations within a particular AWS region, each equipped with redundant power, networking, and cooling. By deploying an application across multiple Availability Zones, the application’s resilience or high availability is enhanced considerably. This is because it becomes resistant to issues like component failure or even an entire zone going down, as the application instances in the other Availability Zones can continue serving users.

On the other hand, deploying the application in another AWS account (Option A) doesn’t necessarily increase resilience, as issues like region-wide outages will affect all accounts within that region.

Similarly, using multiple VPCs (Option B) or multiple subnets (Option C) won’t necessarily contribute to increased resilience. VPCs and subnets provide network isolation but do not inherently provide resilience against hardware failures or zone disruptions.

Therefore, for maximizing resilience of a critical business application in AWS, employing a multi-Availability Zone strategy (Option D) is the soundest approach.

Explanation 8

The correct answer is D. Deploy the application by using multiple Availability Zones.

Availability Zones (AZs) are isolated locations within an AWS region that provide redundant networking, power, and cooling systems. By deploying an application across multiple AZs, a company can increase the resilience of the application by reducing the risk of downtime due to failures in a single AZ.

Each AZ has its own set of instances, and AWS automatically distributes traffic across them. If one AZ experiences an outage, the other AZs can continue to handle traffic, ensuring that the application remains available. Additionally, AWS provides various services, such as Amazon Elastic Block Store (EBS), Amazon Relational Database Service (RDS), and Amazon Elastic Load Balancer (ELB), that can be configured to span multiple AZs, further increasing the resilience of the application.

Option A, deploying a copy of the application in another AWS account, would not increase resilience as it would not provide redundant instances within the same region.

Option B, deploying the application by using multiple VPCs, would not increase resilience as VPCs are virtual networks that operate within a single Availability Zone.

Option C, deploying the application by using multiple subnets, would not increase resilience as subnets are a subset of a VPC and operate within a single Availability Zone.

Therefore, the best answer is D, deploying the application by using multiple Availability Zones, which provides the highest level of resilience for the application.

Explanation 9

The answer is D. Deploy the application by using multiple Availability Zones.

Availability Zones are distinct physical locations within a Region. They are engineered to be isolated from each other, so that a failure in one Availability Zone will not affect the other Availability Zones in the Region.

By deploying the application in multiple Availability Zones, the company can increase the resilience of the application. If one Availability Zone experiences a failure, the application will continue to operate in the other Availability Zones.

This is an important consideration for critical business applications, as it helps to ensure that the application is always available to users.

Explanation 10

To increase resilience for a critical business application in an AWS Region, the most effective approach is to deploy the application using multiple Availability Zones. Therefore, the correct answer is option D.

AWS provides multiple Availability Zones (AZs) within each AWS Region. Availability Zones are physically separate data centers with independent power, cooling, and networking infrastructure. By deploying the application in multiple Availability Zones, you can ensure that your application remains available even if one Availability Zone experiences an outage or disruption.

Here’s why the other options are not the best choices:

A. Deploying a copy of the application in another AWS account: While it’s a good practice to have backups and redundancy, deploying a copy of the application in another AWS account does not inherently provide resilience within the same AWS Region. It may help in disaster recovery scenarios but doesn’t address the resilience within the Region itself.

B. Deploying the application using multiple VPCs: While using multiple Virtual Private Clouds (VPCs) can provide isolation and security boundaries, it doesn’t directly address resilience within the Region. Resilience is more about ensuring high availability and fault tolerance.

C. Deploying the application using multiple subnets: Subnets are logical divisions within a VPC and are typically used for IP address management and network segmentation. While deploying the application across multiple subnets can provide some level of fault tolerance, it still relies on a single Availability Zone. If that Availability Zone becomes unavailable, the application will be impacted.

In summary, deploying the application using multiple Availability Zones is the recommended approach to increase resilience within an AWS Region. This ensures that even if one Availability Zone experiences an issue, the application can continue to operate without disruption.

Explanation 11

I would recommend option D: Deploy the application by using multiple Availability Zones.

Availability Zones (AZs) are isolated locations within an AWS Region that provide redundant infrastructure and services to increase the resilience and availability of applications. By deploying the application across multiple AZs, the company can ensure that the application remains available even in the event of an outage or disruption in one AZ.

Here’s a detailed explanation of why option D is the best choice:

1. Reduced downtime: Deploying the application across multiple AZs ensures that the application remains available even if one AZ experiences an outage or disruption. This reduces downtime and increases the overall availability of the application.
2. Increased fault tolerance: By distributing the application across multiple AZs, the company can tolerate hardware or software failures in one AZ without affecting the overall functionality of the application.
3. Improved scalability: Deploying the application across multiple AZs allows the company to scale the application more easily, as it can use resources from multiple AZs to handle increased traffic or demand.
4. Enhanced security: AWS provides various security features and controls that are distributed across multiple AZs, such as firewall rules and access controls. By deploying the application across multiple AZs, the company can take advantage of these security features and controls to protect the application.

In contrast, options A, B, and C do not provide the same level of resilience and availability as deploying the application across multiple AZs. Option A (Deploy a copy of the application in another AWS account) does not provide any advantages in terms of resilience or availability, as the application would still be running on the same infrastructure. Option B (Deploy the application by using multiple VPCs) and option C (Deploy the application by using multiple subnets) do not provide the same level of redundancy and fault tolerance as deploying the application across multiple AZs.

Therefore, the best answer is option D: Deploy the application by using multiple Availability Zones.

Explanation 12

The answer is D: Deploy the application by using multiple Availability Zones.

To increase resilience for an application in AWS, the best strategy is to deploy the application across multiple Availability Zones within the same region.

Availability Zones are distinct locations that are engineered to be isolated from failures in other Availability Zones and provide inexpensive, low latency network connectivity to other Availability Zones in the same region.

By deploying the application in multiple Availability Zones, you gain the following benefits:

1. Fault Tolerance – If there are failures in one Availability Zone, the application will continue to run in the other Availability Zones, ensuring high availability.
2. Performance – The low latency network connectivity between Availability Zones allows the different parts of your application to communicate seamlessly.
3. Disaster Recovery – In case of a major disaster that impacts one Availability Zone, the application will still be running in the other Availability Zones.

Deploying the application in multiple VPCs (B), multiple subnets (C), or another AWS account (A) will not provide the level of isolation and availability benefits that deploying across multiple Availability Zones will provide. VPCs and subnets can span Availability Zones, and another AWS account will not isolate your application from failures within an Availability Zone.

Explanation 13

To increase resilience for a critical business application in an AWS Region, the company should:

D. Deploy the application by using multiple Availability Zones.

Here’s a detailed explanation of why deploying the application using multiple Availability Zones is the correct choice:

Availability Zones: AWS regions are divided into multiple Availability Zones (AZs). An Availability Zone is a physically separate data center within a region. Each Availability Zone is designed to be independent of failures in other Availability Zones, with its own power, networking, and cooling infrastructure.

Resilience: Deploying the application using multiple Availability Zones increases resilience by distributing the application’s components across different physical locations. This ensures that if one Availability Zone experiences an outage or disruption, the application can continue running from the other Availability Zones without interruption.

High Availability: By utilizing multiple Availability Zones, the application can achieve high availability. High availability means that the application remains accessible and operational even if a single Availability Zone or a component within it fails.

Fault Tolerance: Deploying the application across multiple Availability Zones also enhances fault tolerance. Fault tolerance refers to the ability of a system to continue functioning properly even in the presence of faults or failures. If one Availability Zone fails, the application can automatically failover to another Availability Zone, minimizing downtime and ensuring business continuity.

Load Balancing: When deploying the application across multiple Availability Zones, load balancing can be implemented to distribute incoming traffic evenly across the instances running in different Availability Zones. This improves performance, scalability, and resiliency.

In summary, option D. Deploying the application by using multiple Availability Zones is the recommended approach to increase resilience for a critical business application in an AWS Region. It ensures high availability, fault tolerance, and the ability to handle failures in one Availability Zone without interrupting the application’s operation.

Explanation 14

The best way for the company to increase resilience for this critical business application in an AWS Region is to deploy the application using multiple Availability Zones (AZs).

Availability Zones are physically separate locations within an AWS Region that are engineered to be isolated from failures in other AZs. By deploying the application across multiple AZs, the company ensures that the application will remain available even if one entire AZ experiences a failure.

Deploying the application across multiple accounts does not provide fault isolation. All resources still reside in the same Region.

Using multiple VPCs also does not isolate faults. VPCs are logically isolated networks within an AWS Region.

Deploying the application across multiple subnets provides network segmentation but still keeps resources within the same AZ. A failure of that AZ would impact the application.

Therefore, the best answer is D – deploy the application using multiple Availability Zones. This provides the greatest fault tolerance and resilience for the critical business application.

Explanation 15

The correct answer is D. Deploy the application by using multiple Availability Zones.

To increase resilience for a critical business application, the best approach is to deploy the application across multiple Availability Zones within an AWS Region.

Some key points:

• Availability Zones are distinct locations within an AWS Region that are engineered to be isolated from failures in other Availability Zones.
• By deploying the application in multiple Availability Zones, if one Availability Zone experiences an outage, the application can still run in the other Availability Zones. This provides high availability and fault tolerance.
• Deploying a copy in another AWS account (A) does not guarantee availability within the same Region.
• Using multiple VPCs (B) or subnets (C) within the same Availability Zone does not provide the same level of resilience as deploying across multiple Availability Zones.
• Deploying across Availability Zones minimizes the risk of a single point of failure that could take down the entire application.

Therefore, the best option to increase resilience for this critical business application is to deploy it using multiple Availability Zones (D). This will allow the application to continue running even if one Availability Zone experiences an outage or failure.

In summary, deploying the application across multiple Availability Zones (D) is the most effective way to increase resilience for the application within an AWS Region.

Explanation 16

The best answer is D: Deploy the application by using multiple Availability Zones.

In AWS architecture, Availability Zones are distinct locations that are engineered to be isolated from failures in other Availability Zones and provide inexpensive, low latency network connectivity to other Availability Zones in the same Region. By launching the critical application in multiple Availability Zones, the application will gain the following resilience and high availability benefits:

1. Fault Tolerance: If one Availability Zone becomes unavailable due to a data center failure, power disruption, or network outage, the application will still be able to serve requests from instances in the other Availability Zones.

2. Higher Availability: Launching instances across multiple Availability Zones protects your application from single points of failures within a single Availability Zone.

3. Low Latency: Connectivity between Availability Zones is high speed and low latency, enabling the application instances to work together as a single application.

The other options are not correct because:

A) Deploying a copy of the application in another AWS account will not provide higher availability since both applications will still be in the same Availability Zones.

B) Using multiple VPCs alone will not increase resilience since the instances can still be in a single Availability Zone.

C) Using multiple subnets alone does not provide the isolation benefits of deploying across multiple Availability Zones.

Explanation 17

The correct answer is D. Deploy the application by using multiple Availability Zones.

To increase resilience for a critical business application in an AWS Region, it is recommended to deploy the application using multiple Availability Zones.

AWS Regions are geographic areas that consist of multiple Availability Zones. Each Availability Zone is a separate data center with its own power, networking, and connectivity. By deploying the application across multiple Availability Zones, you ensure that your application can continue running even if one Availability Zone experiences an outage or failure. This provides high availability and fault tolerance for your application.

Deploying a copy of the application in another AWS account (option A) may provide some level of resilience, but it does not guarantee high availability within the same Region. It is more suitable for disaster recovery purposes.

Deploying the application using multiple VPCs (option B) or multiple subnets (option C) within the same Availability Zone does not provide the same level of resilience as deploying across multiple Availability Zones. It is important to distribute your application across different physical locations to minimize the risk of a single point of failure.

Therefore, the best option to increase resilience for the critical business application is to deploy it using multiple Availability Zones (option D).

Explanation 18

The correct answer is D. Deploy the application by using multiple Availability Zones.

An Availability Zone (AZ) is a distinct location within an AWS Region that is isolated from the other AZs in that Region. Each AZ has independent power, cooling, and physical security, and is connected to the other AZs in the same Region by low-latency, high-throughput, and highly redundant networking. By deploying the application by using multiple AZs, the company can increase resilience for this application by ensuring that it can continue to operate even if one or more AZs experience a failure or disruption.

The other options are not correct because:

• A. Deploying a copy of the application in another AWS account does not increase resilience for this application. It only provides a backup option in case the original AWS account is compromised or inaccessible. However, it does not address the availability of the application within a single Region or across Regions.
• B. Deploying the application by using multiple VPCs does not increase resilience for this application. A VPC is a virtual network that is logically isolated from other virtual networks in AWS. It allows you to control the network configuration and security settings for your resources within the VPC. However, it does not provide any redundancy or fault tolerance for your application across different AZs or Regions.
• C. Deploying the application by using multiple subnets does not increase resilience for this application. A subnet is a segment of a VPC’s IP address range that you can use to launch resources in a specific AZ. It allows you to group resources that have similar network requirements and security policies. However, it does not provide any redundancy or fault tolerance for your application across different AZs or Regions.

Explanation 19

According to the AWS blog, one of the best practices for resiliency planning is to house workloads across multiple Availability Zones. This can help reduce the impact of failures and increase availability. Therefore, the answer to your question is D. Deploy the application by using multiple Availability Zones.

Explanation 20

According to one source, one of the best practices for resiliency planning using AWS is to house workloads across multiple Availability Zones. This can help reduce the impact of failures and increase availability. Another source also mentions that using multiple Availability Zones can improve resilience by providing redundancy and fault isolation. Therefore, based on these sources, I think the answer to your question is D. Deploy the application by using multiple Availability Zones.

Explanation 21

The correct answer to the question is D. Deploy the application by using multiple Availability Zones.

An Availability Zone (AZ) is a distinct location within an AWS Region that is isolated from the other AZs in that Region. Each AZ has independent power, cooling, and physical security, and is connected to the other AZs in the same Region by low-latency, high-throughput, and highly redundant networking.

By deploying the application by using multiple AZs, the company can increase resilience for this application by ensuring that it can withstand failures of individual servers, network devices, or even an entire AZ. This way, the application can continue to operate even if one AZ becomes unavailable or degraded.

Some of the benefits of deploying applications across multiple AZs are:

• Improved fault tolerance: If one AZ fails, the application can still run on the other AZs without interruption.
• Enhanced performance: The application can leverage the low-latency network connections between AZs to distribute load and reduce latency for end users.
• Increased scalability: The application can scale up or down based on demand by adding or removing resources in different AZs.

Some of the AWS services that support deploying applications across multiple AZs are:

• Amazon Elastic Compute Cloud (EC2): You can launch EC2 instances in different AZs and use Elastic Load Balancing (ELB) or Amazon Route 53 to distribute traffic across them.
• Amazon Relational Database Service (RDS): You can create RDS instances with Multi-AZ deployments, which automatically provision and maintain a synchronous standby replica in a different AZ for high availability and data durability.
• Amazon Simple Storage Service (S3): You can store your data in S3 buckets that are replicated across multiple AZs within a Region by default.
• Amazon Elastic File System (EFS): You can create EFS file systems that are accessible from EC2 instances in multiple AZs within a Region.

Reference

• 5 best practices for resiliency planning using AWS | AWS Public Sector Blog (amazon.com)
• AWS Resilience Hub – application resilience (amazon.com)
• Understand resiliency patterns and trade-offs to architect efficiently in the cloud | AWS Architecture Blog (amazon.com)

Amazon AWS Certified Cloud Practitioner certification exam practice question and answer (Q&A) dump with detail explanation and reference available free, helpful to pass the Amazon AWS Certified Cloud Practitioner exam and earn Amazon AWS Certified Cloud Practitioner certification.

The post Amazon AWS Certified Cloud Practitioner Q&A: How can company increase resilience for application appeared first on PUPUWEB - Information Resource for Emerging Technology Trends and Cybersecurity.