> For the complete documentation index, see [llms.txt](https://karansingh.gitbook.io/aws-saa-c02/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://karansingh.gitbook.io/aws-saa-c02/ec2/elastic-network-interface-eni.md).

# Elastic Network Interface (ENI)

* It is a **logical networking component in a VPC** that **represents a virtual network card**.<br>

* 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**.