Route 53 Flashcards
What’s the difference between a CNAME and ALIAS record?
ALIAS record maps a NAME to an AWS resource. CNAME maps a NAME to another NAME (e.g. www.pie.com -> www.fruit.com)
How does a private hosted zone differ from a public hosted zone?
A domain registered in a public hosted zone is accessible over public internet/VPCs. In a private hosted zone, a domain is associated with a VPC and only accessible within that VPC.
When would you use simple routing?
When you want to route requests to just one service such as a web server.
True or False: Simple routing supports health checks.
False
What are the 3 types of R53 health checks?
Endpoint, Cloudwatch Alarm, Check of Checks.
When using failover routing, what occurs when a record fails a health check?
Queries return secondary record of the same name.
What is multi value routing, and what can it improve?
Using multiple records with the same name. Improves availability.
How are records returned in weighted routing?
Records are assigned a weight, then the weight/sum of weights determines probability of user being routed to a particular domain.
What record is returned in latency based routing?
THe record which offers lowest estimated latency based on region of service and user’s general location.
What is the difference between geoproximity and geolocation routing?
In geoproximity, record closest to user is returned. In geolocation, record tagged with (most specific) user’s location is returned.
What kind of location tagging does geolocation support?
US state, country, continent.
