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Route53, Health Check, DNS Failover Config, Hosted Zone, DNS (https…

- - - - www
  - - - .com
      - .net
  - - - example
- - - - IPv4
    - - IPv6
    - - Maps a hostname to another hostname
        
        The target is a domain name which must have an A or AAAA record
        
        Only for non root domain
    - - Name Server for Hosted Zone
        
        Control how traffic is routed for a domain
    - - Specific to DNS providers
        
        Can point to
        
        Hostname
        
        AWS Resources
        
        ELB
        
        CloudFront Distributions
        
        API Gateway
        
        Elastic Beanstalk environments
        
        S3 Websites
        
        VPC Interface Endpoint
        
        Global Accelerator
        
        Route 53 record in the same hosted zone
        
        Work for both root and nonroot domain
        
        Free
        
        Native health check
        
        Cannot set the TTL
  - - - Route traffic to single resource
      - Can have multiple value in one record
        
        Client will choose randomly
      - Cannot associated with Health Check
    - - Control the % of the requests that go to each
        specific resource
        
        Assign a weight of 0 to a record to stop sending
        traffic to a resource
        
        If all records have weight of 0, then all records will
        be returned equally
      - DNS records must have the same name and type
      - Can be associated with Health Checks
    - - Health Checks is mandatory
    - - Redirect to the resource that
        has the least latency close user
      - Based on traffic between users and AWS Region
    - - Based on user location
      - Can be associated with Health Checks
    - - based on the geographic location of users and
        resources
      - Ability to shift more traffic to resources based on the defined bias
        
        1 to 99 – more traffic to the resource
        
        -1 to -99 – less traffic to the resource
      - Must use Route 53 Traffic Flow
    - - Use when routing traffic to multiple resources
      - Up to 8 healthy records are returned for each Multi-Value query
    - - Routing is based on clients’ IP addresses
      - Provide a list of CIDR
  - - - how long the record cached at DNS Resolvers