A customer is hosting their company website on a cluster of web servers that are behind a public-facing load
balancer. The customer also uses Amazon Route 53 to manage their public DNS. How should the customer
configure the DNS zone apex record to point to the load balancer?
A.
Create an A record pointing to the IP address of the load balancer
B.
Create a CNAME record pointing to the load balancer DNS name.
C.
Create a CNAME record aliased to the load balancer DNS name.
D.
Create an A record aliased to the load balancer DNS name
Explanation:
http://docs.aws.amazon.com/ElasticLoadBalancing/latest/DeveloperGuide/using-domain-names-with-elb.html
Answer D
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I agree, D
when zone apex is in question look for Alias record. Amazon invented the Alias record to solve the problem of no IP address provided for your ELB and how to point apex at a zone apex DNS name.
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It must be D.
Because Alias records help map the apex zone (root domain without the www) records to the load balancer DNS name as the DNS specification requires “zone apex” to point to an ‘A’ record (ip address) and not to an CNAME.
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D
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D
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D
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Correct Answer is D
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D
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Next, use your DNS service, such as your domain registrar, to create a CNAME record to route queries to your load balancer. For more information, see the documentation for your DNS service.
Alternatively, you can use Amazon Route 53 as your DNS service. You create a hosted zone, which contains information about how to route traffic on the Internet for your domain, and an alias resource record set, which routes queries for your domain name to your load balancer. Amazon Route 53 doesn’t charge for DNS queries for alias record sets, and you can use alias record sets to route DNS queries to your load balancer for the zone apex of your domain (for example, example.com).
from: http://docs.aws.amazon.com/elasticloadbalancing/latest/classic/using-domain-names-with-elb.html
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Not sure what that has to do with anything. The answer is D
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Fellas,
“The A record maps a name to one or more IP addresses”
Name to IP address is A record, what am I missing here -)
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A Records are the most basic type of DNS record and are used to point a domain or subdomain to an IP address. (c)
Alias is not the same as A, so C is correct answer.
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From: http://docs.aws.amazon.com/Route53/latest/DeveloperGuide/ResourceRecordTypes.html#AFormat
“The value for an A record is an IPv4 address in dotted decimal notation.”
So D cannot be correct answer, cause You have only ELB DNS address.
From:
http://docs.aws.amazon.com/Route53/latest/DeveloperGuide/resource-record-sets-choosing-alias-non-alias.html
“You can create an alias resource record set at the zone apex.”
So answer is C
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D.
Create an A record aliased to the load balancer DNS name
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