Exam AWS Certified SysOps Administrator - Associate topic 1 question 367 discussion

AWS Global Accelerator is a service that helps to improve the availability and performance of applications by directing traffic through the AWS global network. It automatically routes traffic to the closest AWS Region based on the lowest latency for the end user. By creating an endpoint group for each AWS Region, the Global Accelerator can distribute traffic across multiple Regions. This means that users will be routed to the Region with the lowest latency, ensuring the best performance for their location. Adding a listener to the accelerator allows it to listen for incoming traffic and direct it to the appropriate endpoint group. The AWS Global Accelerator constantly monitors the health of the endpoints (applications) in each endpoint group. If an endpoint becomes unhealthy or experiences a failure, the Global Accelerator automatically reroutes traffic to a healthy instance of the application in another Region, ensuring high availability and automatic failover.

AWS Global Accelerator is designed to route traffic across multiple AWS Regions with low-latency, high-availability, and automatic failover. By creating an AWS Global Accelerator standard accelerator, you can create endpoint groups for each Region where your application is deployed. The accelerator automatically directs traffic to the healthy endpoint within the endpoint group. This solution provides a low-latency routing policy and supports automatic failover, meeting the requirements specified. Option A (using Route 53 with a latency routing policy) could work for latency-based routing but does not provide automatic failover. Option B (using Route 53 with a failover routing policy) could provide failover, but it doesn't explicitly mention the requirement for low-latency routing. Option D (using Route 53 with a geolocation routing policy) is based on geographic location and doesn't explicitly prioritize low-latency routing or provide automatic failover.

Global Accelerator is positioned in front of Route 53. It reacts faster than Route 53 for both latency-based distribution and failover.

Global Accelerator doesn’t inherently prioritize latency-based routing

A is correct. For C. AWS Global Accelerator improves global application availability and performance using the AWS global network. While it routes user traffic to healthy endpoints and can work well for global applications, it doesn't specifically route based on latency.

AWS Global Accelerator: This service is designed to route user traffic to the nearest AWS endpoint with the lowest latency. It uses the AWS global network, improving the user experience by reducing the number of hops and potentially the distance that user traffic must travel. It also provides automatic failover to the next closest endpoint that is healthy, ensuring high availability and resilience.

Correct answer is A

Answer: C AWS Global Accelerator always routes user traffic to the optimal endpoint based on performance, reacting instantly to changes in application health, your user’s location, and policies that you configure. AWS Global Accelerator automatically checks the health of your applications and routes user traffic only to healthy application endpoints. If the health status changes or you make configuration updates, AWS Global Accelerator reacts instantaneously to route your users to the next available endpoint.

Global accelerator cannot satisfy the lowest latency requirement. only latency based routing policy can. it can max out performance but in the documentation the wording does not state latency. it covers many different factors but latency isn't one of them. The wording in the question to me doesn't scream out failover. they are asking if traffic will be re routed to another healthy instance in the event of the lowest latency instance failing. still using the lowest latency policy it will hit the other instance in the ALB target group. This is a tricky one but I cant see past the "has to route based on latency"

option A is working, but correct answer is D, coz the question say "the shortest failover time". route 53 health check take more time than aws global accellerator to understand an endpoint failure

Global Accelerator

Option C is the solution that meets the requirements for routing users to the Region with the lowest latency and providing automatic failover. AWS Global Accelerator is designed to improve the availability and performance of applications by leveraging AWS's global network. By using Global Accelerator, you can direct user traffic to the closest AWS edge location, reducing latency and improving the application's responsiveness.

It´s latency based routing with failover.

AAAAAA?