Route 53

Question 1

What is a CNAME record?

Answer 1

A CNAME record maps one record name to another, not an IP Address. Only works for non-root domain

Question 2

What is the difference between a CNAME and an alias?

Answer 2

A CNAME points a hostname to another hostname. An alias points a hostname to an AWS resource. An alias also works for root domain AND non-root domain

Question 3

What is the difference between a Domain and a Hosted Zone?

Answer 3

A domain is a general DNS concept. A hosted zone is a Route 53 concept; it represents a collection of records that can be managed together, belonging to a single parent domain name.

Question 4

What is a TTL on an A record?

Answer 4

A records do not have TTL

Question 5

Why would you use an Alias record?

Answer 5

You would use an Alias record to map a domain name to an AWS resource. AWS will automatically update IP changes of the resources if they are to change.

Question 6

Can a Simple routing policy return multiple values?

Answer 6

Yes, the client selects which one to use at random

Question 7

Why would you use a Weighted routing policy?

Answer 7

A weighted routing policy will enable you to define which resources should take on the most traffic

Question 8

True or False: health checks for Route 53 are only for public resources?

Answer 8

True

Question 9

How could we configure a health check on a private hosted resource?

Answer 9

We can create a CloudWatch Metric and a CloudWatch alarm on that metric. Then create a health check that checks the alarm itself.

Question 10

What is the difference between Geolocation and Geoproximity Routing policy?

Answer 10

Geoproximity is based off the location of users and resources AND the bias (preference) given to the resources

Question 11

You have purchased mycoolcompany.com on Amazon Route 53 Registrar and would like the domain to point to your Elastic Load Balancer my-elb-1234567890.us-west-2.elb.amazonaws.com. Which Route 53 Record type must you use here?

Answer 11

Alias

Question 12

You have deployed a new Elastic Beanstalk environment and would like to direct 5% of your production traffic to this new environment. This allows you to monitor for CloudWatch metrics and ensuring that there’re no bugs exist with your new environment. Which Route 53 Record type allows you to do so?

Answer 12

Weighted