Route53 and DNS

Question 1

__________ records are used to map resource record sets in your hosted zone to ELBs.

Answer 1

Alias.

Question 2

Which Route53 routing policy is the default when creating new record sets?

Answer 2

Simple routing.

Question 3

True or False: Given the choice, you should always choose a CNAME over an Alias record.

Answer 3

False. They work the same, but AWS charges for CNAME lookups.

Question 4

What is an Alias record?

Answer 4

Alias records are used to map resource record sets in your hosted zone to ELBs (or CloudFront distributions, or S3 buckets configured as websites).

Question 5

Describe Route53’s simple routing policy.

Answer 5

Allows you to route all of your traffic to a single resource. Used when you have a single resource that performs a given function for your domain.

Question 6

True or False: AWS does not charge for Route53 requests for Alias records.

Answer 6

True.

Question 7

ELB’s do not have pre-defined __________, you resolve to them using a DNS name.

Answer 7

IPv4 addresses.

Question 8

ELB’s do not have pre-defined IPv4 addresses, you resolve to them using a __________.

Answer 8

DNS name.

Question 9

True or False: AWS does not charge for Route53 requests for CNAME records.

Answer 9

False.

Question 10

True or False: Given the choice, you should always choose an Alias record over a CNAME.

Answer 10

True.

Question 11

Describe Route53’s weighted routing policy.

Answer 11

Allows you to route percentages of your traffic to different hosts. Used mostly for A/B testing.

Question 12

ELBs don’t have predefined IPv4 addresses you resolve to them using a __________.

Answer 12

DNS name.

Question 13

Alias records are used to map resource record sets in your hosted zone to __________.

Answer 13

ELBs.

Question 14

Which DNS record is used to resolve a naked domain name to an ELB’s DNS address?

Answer 14

Alias record.

Question 15

Which Route53 routing policy allows you to route traffic based on the location from which DNS queries originate?

Answer 15

Geolocation routing.

Question 16

__________ don’t have predefined IPv4 addresses, you resolve to them using a DNS name.

Answer 16

ELBs.

Question 17

True or False: Route53 is restricted to specific regions.

Answer 17

False. Like IAM, Route53 is in the Global region.

Question 18

ELBs don’t have predefined __________, you resolve to them using a DNS name.

Answer 18

IPv4 addresses.

Question 19

Describe Route53’s geolocation routing policy.

Answer 19

Allows you to choose where your traffic will be sent based on the geographic location of your users.

Question 20

Which Route53 routing policy allows you to set up active/passive routing?

Answer 20

Failover routing.

Question 21

True or False: Route53 is in the global region.

Answer 21

True.

Question 22

What is the purpose of an Alias record?

Answer 22

To resolve a naked domain name (zone apex address) to an ELB’s DNS address.

Question 23

Which Route53 routing policy allows you to route percentages of your traffic to different hosts?

Answer 23

Weighted routing.

Question 24

Which Route53 routing policy allows you to route your traffic to the region which will give them the fastest response time?

Answer 24

Latency-based routing.

Question 25

Describe Route53’s failover routing policy.

Answer 25

Allows you to set up active/passive routing.

Question 26

Describe Route53’s latency routing policy.

Answer 26

Allows you to route your traffic based on the lowest network latency for your end user.

Question 27

Which Route53 routing policy allows you to route traffic to a secondary site if the primary site goes down?

Answer 27

Failover routing.

Question 28

True or False: AWS charges for Route53 requests for Alias records.

Answer 28

False.