Route53 and DNS Flashcards
__________ records are used to map resource record sets in your hosted zone to ELBs.
Alias.
Which Route53 routing policy is the default when creating new record sets?
Simple routing.
True or False: Given the choice, you should always choose a CNAME over an Alias record.
False. They work the same, but AWS charges for CNAME lookups.
What is an Alias record?
Alias records are used to map resource record sets in your hosted zone to ELBs (or CloudFront distributions, or S3 buckets configured as websites).
Describe Route53’s simple routing policy.
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.
True or False: AWS does not charge for Route53 requests for Alias records.
True.
ELB’s do not have pre-defined __________, you resolve to them using a DNS name.
IPv4 addresses.
ELB’s do not have pre-defined IPv4 addresses, you resolve to them using a __________.
DNS name.
True or False: AWS does not charge for Route53 requests for CNAME records.
False.
True or False: Given the choice, you should always choose an Alias record over a CNAME.
True.
Describe Route53’s weighted routing policy.
Allows you to route percentages of your traffic to different hosts. Used mostly for A/B testing.
ELBs don’t have predefined IPv4 addresses you resolve to them using a __________.
DNS name.
Alias records are used to map resource record sets in your hosted zone to __________.
ELBs.
Which DNS record is used to resolve a naked domain name to an ELB’s DNS address?
Alias record.
Which Route53 routing policy allows you to route traffic based on the location from which DNS queries originate?
Geolocation routing.
__________ don’t have predefined IPv4 addresses, you resolve to them using a DNS name.
ELBs.
True or False: Route53 is restricted to specific regions.
False. Like IAM, Route53 is in the Global region.
ELBs don’t have predefined __________, you resolve to them using a DNS name.
IPv4 addresses.
Describe Route53’s geolocation routing policy.
Allows you to choose where your traffic will be sent based on the geographic location of your users.
Which Route53 routing policy allows you to set up active/passive routing?
Failover routing.
True or False: Route53 is in the global region.
True.
What is the purpose of an Alias record?
To resolve a naked domain name (zone apex address) to an ELB’s DNS address.
Which Route53 routing policy allows you to route percentages of your traffic to different hosts?
Weighted routing.
Which Route53 routing policy allows you to route your traffic to the region which will give them the fastest response time?
Latency-based routing.
Describe Route53’s failover routing policy.
Allows you to set up active/passive routing.
Describe Route53’s latency routing policy.
Allows you to route your traffic based on the lowest network latency for your end user.
Which Route53 routing policy allows you to route traffic to a secondary site if the primary site goes down?
Failover routing.
True or False: AWS charges for Route53 requests for Alias records.
False.
