AWS Certified Solutions Architect – Professional SAP-C01 – Question341

One of the components that is part of ec2-net-utils used with ENI's is ec2ifscan.
Which of the following is not correct about ec2-net-utils?

A. ec2-net-utils generates an interface configuration file suitable for use with DHCP.
B. ec2-net-utils extends the functionality of the standard if up.
C. ec2-net-utils detaches a primary network interface from an instance.
D. ec2-net-utils identifies network interfaces when they are attached, detached, or reattached to a running instance.

Correct Answer: C

Explanation:

Explanation: Each instance in a VPC has a default elastic network interface (the primary network interface) that is assigned a private IP address from the IP address range of your VPC. You cannot detach a primary network interface from an instance. You can create and attach additional elastic network interfaces. Amazon Linux AMIs may contain additional scripts installed by AWS, known as ec2-net-utils. One of the components that is part of ec2-net-utils used with ENI’s is ec2ifscan. Its function is to check for network interfaces that have not been configured and configure them.
Reference:
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-eni.html