ANS-C01 Question 406
Single answerYour company is running an application on EC2 instances within a VPC. You need to configure the instances to handle high-volume traffic efficiently. The application requires the ability to access multiple IP addresses simultaneously, and you must ensure that failover between network interfaces is seamless in case of network disruptions. Which type of network interface on AWS is best suited for this scenario?
- A
Elastic Network Interface (ENI)
- B
Elastic Fabric Adapter (EFA)
- C
Private Virtual Interface
- D
Instance Metadata Interface
Show answer and explanation
Correct answer: A
Explanation
Elastic Network Interfaces (ENIs) are designed to add flexibility and scalability to AWS networking. They allow for multiple IP addresses, support failover configurations, and can be attached or detached from instances, making them the ideal solution for handling high-volume traffic with seamless redundancy. The other options do not meet the requirements for this scenario.
- A. Correct.
Elastic Network Interface (ENI) is the correct choice because it allows you to attach multiple IP addresses, configure failover, and provides flexibility for high availability.
- B. Incorrect.
Elastic Fabric Adapter (EFA) is used for high-performance computing and tightly coupled workloads, not for handling multiple IP addresses or failover scenarios.
- C. Incorrect.
Private Virtual Interface is specific to Direct Connect for establishing private connectivity to on-premises environments and is not relevant for EC2 network configurations.
- D. Incorrect.
Instance Metadata Interface is used to retrieve instance metadata and user data, not for configuring or managing network traffic or failover.