ANS-C01 Question 408
Single answerAn enterprise is migrating its on-premises workload to AWS and is designing its VPC architecture. The workload requires high availability, scalability, and network interface flexibility to support multiple IP addresses and traffic sources. Which type of network interface should the enterprise use to meet these requirements?
- A
Elastic Network Interface (ENI)
- B
Elastic Fabric Adapter (EFA)
- C
Interface VPC Endpoint
- D
Gateway Load Balancer Endpoint
Show answer and explanation
Correct answer: A
Explanation
Elastic Network Interface (ENI) is the appropriate choice for scenarios requiring flexibility in network configurations, multiple IP addresses, and traffic routing within a VPC. ENIs can be attached to EC2 instances and are pivotal in designing scalable and highly available architectures. Other options focus on specialized use cases such as HPC, private communication with AWS services, or traffic forwarding.
- A. Correct.
Elastic Network Interface (ENI) is the correct choice as it allows for multiple IP addresses, flexibility in network configurations, and traffic routing. It is designed to support high availability and scalability as part of an EC2 instance or a separate attachment.
- B. Incorrect.
Elastic Fabric Adapter (EFA) is designed for high-performance computing (HPC) and tightly coupled workloads, focusing on low-latency and inter-instance communication rather than general-purpose networking with multiple IPs.
- C. Incorrect.
Interface VPC Endpoint is used for private communication with AWS services over the AWS network, but it does not provide the flexibility of multiple IP addresses or general-purpose traffic handling.
- D. Incorrect.
Gateway Load Balancer Endpoint is specific to traffic forwarding for network appliances and is not intended for general-purpose networking or attaching to EC2 instances.