> For the complete documentation index, see [llms.txt](https://dev7days.gitbook.io/dev7days/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dev7days.gitbook.io/dev7days/aws/ec2/elastic-network-interface-eni.md).

# Elastic Network Interface (ENI)

It is a component in VPC that represents `virtual network card`. (Specific AZ) ENI consist of 

* One Elastic IP per private IPv4
* One Public IPv4
* One or more security group<br>

This component will be created and attached to EC2. You can create ENI and attach to EC on the fly for failover.

<img src="https://2166680554-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FP9VzT74ziIucCaJgfreE%2Fuploads%2FsWlT5IrgYkE2FDKRyyjY%2Ffile.excalidraw.svg?alt=media&amp;token=0bfe2dcb-7b07-437b-b635-2064fc8b4cfc" alt="" class="gitbook-drawing">

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