Elastic Network Interface (ENI)

• It is a logical networking component in a VPC that represents a virtual network card.

• It can include the following attributes:

  • A primary private IPv4 address from the IPv4 address range of your VPC

  • One or more secondary private IPv4 addresses from the IPv4 address range of your VPC

  • One Elastic IP address (IPv4) per private IPv4 address

  • One public IPv4 address

  • One or more IPv6 addresses

  • One or more security groups

  • A MAC address

  • A source/destination check flag

  • A description

• You can create and configure network interfaces in your account and attach them to instances.