Exam AWS Certified Solutions Architect - Associate SAA-C02 topic 1 question 8 discussion

B and E - applications more resilient https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/disaster-recovery-resiliency.html

B&E Q: How is AWS Global Accelerator different from Amazon CloudFront? A: AWS Global Accelerator and Amazon CloudFront are separate services that use the AWS global network and its edge locations around the world. CloudFront improves performance for both cacheable content (such as images and videos) and dynamic content (such as API acceleration and dynamic site delivery). Global Accelerator improves performance for a wide range of applications over TCP or UDP by proxying packets at the edge to applications running in one or more AWS Regions. Global Accelerator is a good fit for non-HTTP use cases, such as gaming (UDP), IoT (MQTT), or Voice over IP, as well as for HTTP use cases that specifically require static IP addresses or deterministic, fast regional failover. Both services integrate with AWS Shield for DDoS protection.

BE - Aurora replicates data 6 times and is fast as well, and cost efficient , CF delivers content data, is secure, distributes data to edge locations, is low latency also cost effective, and scales to meet request demands.

BE is more appropriate options

B and D.The correct answers are Add Aurora Replicas and Add AWS Global Accelerator This question is about resilience , not about reducing latency or improving performance so we need to select options that would make the application more resilient to periodic increases in request rates. Aurora Replica's ability to scale read operations will help make the application more resilient to periodic increases in request rates. Wherever you route your traffic on the AWS network, with Global Accelerator, failover between application origins happens automatically and within seconds. If Global Accelerator detects the failure of your application endpoint it instantly triggers traffic re-routing to the next available, closest endpoint in another AZ or AWS Region. One of the benefits of using AWS Global Accelerator is that it helps you improve your application's resiliency and availability.

Adding Aurora replica and Cloud formation

Global accelerator probably cant help much on resiliency for increase request rate as it will still point to that one and only closest endpoint. Adding aurora replica seems a good fit because application can direct read/write traffic among master/replica aurora nodes to ease request rate hence making architecture more resilient.

Makes applications more resilient.

If latency was an issue then for sure Global accelerator. The question is about requests that will be handled by adding read replicas and fronted by Cloudfront for fast access

BE confirmed by Neal Dumps

should treat the web tier architecture, so front end as well as backend. for the front end use the cloudfront and for the backend uses the aurora replica

I will go with C

my guess is DE

I will go with B and E

why not A? shield will help protect against rate based ddos

ANS: B&E

B. Add Aurora Replica = For DB Read Offloading from the sole Pri Aurora DB instance as well as standby for failover. E. Add an Amazon CloudFront distribution in front of the Application Load Balancer = For fast content caching at the edge location nearest to users