Distribute Traffic Proportionately | AWS Certified Solutions Architect - Associate
Question
A company is planning to host an active-active site.
One site will be deployed in AWS, and the other one on their On-premise data center.
They need to ensure that the traffic is distributed to multiple resources, proportionately between both sites.
Which of the following routing policy would you use for this purpose?
Answers
Explanations
Click on the arrows to vote for the correct answer
A. B. C. D.Answer - D.
The AWS Documentation mentions the following.
Weighted routing lets you associate multiple resources with a single domain name (example.com) or subdomain name (acme.example.com) and choose how much traffic is routed to each resource.
This can be useful for various purposes, including load balancing and testing new versions of software.
To configure weighted routing, you create records with the same name and type for each of your resources.
You assign each record a relative weight that corresponds with how much traffic you want to send to each resource.
Amazon Route 53 sends traffic to a resource based on the weight you assign to the record as a proportion of the total weight for all the group records.
Option A is incorrect since this should be used when you want to configure standard DNS records.
Option B is incorrect since this should be used when you want to route traffic to a resource when the resource is healthy or to a different resource when the first resource is unhealthy.
Option C is incorrect since this should be used when you want to improve your users' performance by serving their requests from the AWS Region that provides the lowest latency.
For more information on a Routing policy, please refer to the below URL-
https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/routing-policy.htmlFor this scenario, we need a routing policy that can distribute the traffic to both sites proportionately. A routing policy is a configuration that determines how Amazon Route 53 responds to DNS queries.
The routing policy that best suits this scenario is Weighted Routing, which allows distributing traffic to multiple resources in a weighted manner based on the specified value.
With Weighted Routing, we can create multiple records with the same name and associate them with different IP addresses of the resources in different locations. Then we can assign a weight to each record. The weight determines the proportion of traffic that goes to each resource.
For instance, if we have two resources, one in AWS and one in the On-premise data center, we can assign each resource a weight of 50%. Then, when a user requests access to the site, Amazon Route 53 will return both IP addresses, and 50% of the traffic will go to each resource.
Therefore, the correct answer is D. Weighted Routing.
