AWS Certified Solutions Architect – Professional SAP-C01 – Question353

To ensure failover capabilities on an elastic network interface (ENI), what should you use for incoming traffic?

A. A Route53 A record
B. A secondary private IP
C. A secondary public IP
D. A secondary ENI

Correct Answer: B

Explanation:

Explanation: To ensure failover capabilities on an elastic network interface (ENI), consider using a secondary private IP for incoming traffic and if a failure occurs, you can move the interface and/or secondary private IP address to a standby instance.
Reference:
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-eni.html