AWS Certified Solutions Architect – Professional SAP-C01 – Question180

An organization is purchasing licensed software. The software license can be registered only to a specific MAC Address. The organization is going to host the software in the AWS environment.
How can the organization fulfil the license requirement as the MAC address changes every time an instance is started/ stopped/terminated?

A. It is not possible to have a fixed MAC address with AWS.
B. The organization should use VPC with the private subnet and configure the MAC address with that subnet.
C. The organization should use VPC with an elastic network interface which will have a fixed MAC Address.
D. The organization should use VPC since VPC allows to configure the MAC address for each EC2 instance.

Correct Answer: C

Explanation:

Explanation: A Virtual Private Cloud (VPC) is a virtual network dedicated to the user’s AWS account. It enables the user to launch AWS resources into a virtual network that the user has defined. An Elastic Network Interface (ENI) is a virtual network interface that the user can attach to an instance in a VPC. An ENI can include attributes such as: a primary private IP address, one or more secondary private IP addresses, one elastic IP address per private IP address, one public IP address, one or more security groups, a MAC address, a source/destination check flag, and a description. The user can create a network interface, attach it to an instance, detach it from an instance, and attach it to another instance. The attributes of a network interface follow the network interface as it is attached or detached from an instance and reattached to another instance. Thus, the user can maintain a fixed MAC using the network interface.
Reference:
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-eni.html