Routing Policies

5 minutes 5 Questions

Routing policies are configurations used by Route 53 to determine how DNS queries should be answered based on various criteria, such as geographical location or latency. Route 53 offers several types of routing policies, including simple, weighted, latency-based, failover, and geolocation. These policies provide flexibility and control over the distribution of traffic to different resources, enabling users to balance loads, route traffic to resources with the lowest latency, or implement failover strategies to increase the availability of their applications and services.

Guide to AWS Route 53 Routing Policies

What is the Routing Policies:
AWS Route 53 Routing Policies is an essential feature of the Amazon Web Services platform that allows you to control how traffic is routed to different resources in your environment, such as servers, databases, and services. There are multiple types of Routing Policies available, including Simple, Weighted, Latency, Failover, and Geolocation.

Importance of Routing Policies:
Routing Policies are vital for managing traffic: they ensure performance optimization by directing traffic to the most efficient resource, providing fault tolerance by rerouting traffic in case of failure, and even controlling distribution based on geographical location.

How it works:
A Routing Policy works by determining where to send a query based on the policies' rules. For example, in a failover setup, if the primary resource fails, the policy will switch to a secondary resource.

Exam Tips:
When answering questions on Routing Policies, it's crucial to remember the characteristics and use-cases of each policy type. Simple Routing: Use when you have a single resource that performs a function for your domain, Failover Routing: Ideal for active-passive failover, Geolocation Routing: Direct traffic based on geographical location, Latency Routing: Route traffic to the resource that can provide the lowest latency, Weighted Routing: Distribute traffic to resources in proportions that you specify. Stick to these principles, and you'll be well on your way to answering any Routing Policy question. Good luck!

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Question 1

A company with high traffic has an architecture that redirects users to different backends depending on their location. As a Solutions Architect, what type of routing policy should you use?

Weighted Routing Simple Routing Geolocation Routing Latency-based Routing

Correct Answer: Geolocation Routing

Geolocation routing directs traffic according to the user's location. This is helpful when needing to route users to different backends based on their location.

Question 2

A company with two AWS environments, one for production and one for testing, wants to balance their incoming traffic as per their configured weight. Which routing policy would you recommend?

Weighted Routing Geolocation Routing Simple Routing Failover Routing

Correct Answer: Weighted Routing

Weighted Routing enables you to distribute traffic among resources based on configurable 'weights'. It allocates a percentage of traffic to primary resources while redirecting the specified remaining traffic to secondary resources.

Question 3

A solutions architect is tasked with creating a highly available DNS configuration to simultaneously return multiple healthy records in response to a DNS query. Which routing policy should be used?

Multivalue Answer Routing Weighted Routing Geolocation Routing Simple Routing

Correct Answer: Multivalue Answer Routing

Multivalue Answer Routing is used when you want multiple resources to be returned in a single DNS response. In this case, the policy will return multiple values in response to a DNS query, which helps provide high availability.

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