每天半小时搞定 AoAWS (十四)

Architecting on AWS 学习笔记系列文章导航页面

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47.An application needs to access data in another AWS account in the same region.Which of the following can be used to ensure that the data can be accessed as required?
A. Establish a NAT instance between both accounts.
B. Use a VPN between both accounts
C. Use a NAT Gateway between both accounts.
D. Use VPC Peering between both accounts.

Note:
NAT is used when private resources are required to access the Internet.

VPN is used to create a connection between the On-premises and AWS resources.

VPC Peering connection is a networking connection between two VPCs that enables you to route traffic between them privately. Instances in either VPC can communicate with each other as if they are within the same network. You can create a VPC Peering connection between your own VPCs, with a VPC in another AWS account, or with a VPC in a different AWS Region. For more information on VPC Peering, please visit the following URL: (https://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/vpc-peering.html)

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A company owns an API which currently gets 1000 requests per second.
The company wants to host this in a cost effective manner using AWS. Which one of the following solution is best suited for this?
A. Use API Gateway with the backend services as it is.
B. Use the API Gateway along with AWS Lambda
C. Use CloudFront along with the API backend service as it is.
D. Use ElastiCache along with the API backend service as it is.

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49.An application currently using a NAT Instance that is required to use a NAT Gateway. Which of the following can be used to accomplish this?
A. Use NAT Instances along with the NAT Gateway.
B. Host the NAT Instance in the private subnet.
C. Migrate from a NAT Instance to a NAT Gateway and host the NAT Gateway in the public subnet
D. Convert the NAT Instance to a NAT Gateway.

Note:
One can simply start and stop using the NAT Gateway service using the deployed NAT instances. But you need to ensure that the NAT Gateway is deployed in the public subnet. For more information on migrating to a NAT Gateway, please visit the following URL: (https://aws.amazon.com/premiumsupport/knowledge-center/migrate-nat-instance-gateway/)

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