Route53

Question 1

Out of https://api.www.example.com, what is the top level domain?

Answer 1

.com

Question 2

Out of https://api.www.example.com, what is the second level domain?

Answer 2

example.com

Question 3

Out of https://api.www.example.com, what is the sub domain?

Answer 3

www.example.com

Question 4

Out of https://api.www.example.com, what is the domain name?

Answer 4

api.www.example.com

Question 5

Out of https://api.www.example.com, what is the protocol?

Answer 5

https

Question 6

What does Authoritative DNS mean?

Answer 6

It means the customer (you) can update DNS records

Question 7

What does the A Record Type do?

Answer 7

It maps a hostname to an IPv4

Question 8

What does a AAAA Record Type do?

Answer 8

It maps a hostname to an IPv6

Question 9

What does a CNAME Record Type do?

Answer 9

It maps a hostname to another hostname

Question 10

What are NS Record Types?

Answer 10

They are Name Servers for the Hosted Zone

Question 11

Is a TTL required for all Records?

Answer 11

Everything except the Alias Record

Question 12

What is an Alias Record Type?

Answer 12

It maps a hostname to an AWS resource

Question 13

What are the 5 differences between Alias and CNAME?

Answer 13

• CNAME maps a hostname to another hostname
• Alias maps a hostname to an AWS resource
• CNAME will not work for a non-root domain (something.mydomain.com)
• Alias works for root and non-root domains
• Alias is free of charge

Question 14

What can you NOT set an Alias record for?

Answer 14

An EC2 DNS name

Question 15

What are the 7 Routing Policies in AWS?

Answer 15

• Simple
• Weighted
• Failover
• Latency Based
• Geolocation
• Multi Value Answer
• GeoProximity

Question 16

How does the Simple Routing Policy work?

Answer 16

• It routes traffic to a single resource.
• If multiple values are returned, a random one is chosen.
• Cannot be associated with Health Checks

Question 17

How does the Weighted Routing Policy work?

Answer 17

• It allows you to assign a % of requests to each specific resource
• Can be associated with Health Checks

Question 18

How does the Latency Routing Policy work?

Answer 18

• It redirects traffic to the resource that has the least latency close to us

Question 19

How does the Failover Routing Policy work?

Answer 19

• It uses the mandatory health check to check the resource is healthy.
• If not, it fails over to the secondary resource

Question 20

How does the Geolocation Routing Policy work?

Answer 20

• It routes based on the users location

Question 21

How does the Geoproximity Routing Policy work?

Answer 21

• It routes based on the geographic location of the users and resources
• You have the ability to shift more traffic to resources based on the defined bias
• You must use the Route53 Traffic Flow

Question 22

How does the Multi Value Routing Policy work?

Answer 22

• It routes traffic to multiple resources

- Not a replacement for an ELB but can be thought of as client side load balancing