A company has a microservice that runs on a set of Amazon EC2 instances. The EC2 instances run behind an Application Load Balancer (ALB). A CloudOps engineer must use Amazon Route 53 to create a recor

The correct answer is C. An alias record. To route traffic from example.com to an Application Load Balancer (ALB), you must use an alias record in Amazon Route 53. Alias records are a Route 53–specific extension of DNS that allows mapping a domain name directly to AWS resources such as ALBs, CloudFront distributions, and

Submitted by jaden.t· Mar 5, 2026Networking

Question

A company has a microservice that runs on a set of Amazon EC2 instances. The EC2 instances run behind an Application Load Balancer (ALB). A CloudOps engineer must use Amazon Route 53 to create a record that maps the ALB URL to example.com. Which type of record will meet this requirement?

Options

AAn A record
BAn AAAA record
CAn alias record
DA CNAME record

How the community answered

(31 responses)

A
3% (1)
B
10% (3)
C
81% (25)
D
6% (2)

Explanation

To route traffic from example.com to an Application Load Balancer (ALB), you must use an alias record in Amazon Route 53. Alias records are a Route 53–specific extension of DNS that allows mapping a domain name directly to AWS resources such as ALBs, CloudFront distributions, and S3 websites. Unlike a CNAME record, an alias record works at the zone apex (e.g., example.com) and does not incur extra DNS lookup charges.

Topics

#Route 53 alias record#ALB DNS mapping#DNS record types#CNAME vs alias

Community Discussion

No community discussion yet for this question.

Full SOA-C03 Practice