AWS - Elastic Network Interface (ENI)

Hello Guys,
Welcome Back.

We will see on this video about the AWS - Elastic Network Interface (ENI)
What is it, how to create it & how to add the new ENI to the instance on running mode.

ENIs are virtual network cards you can attach to your EC2 instances. They are used to enable network connectivity for your instances, and having more than one of them connected to your instance allows it to communicate on two different subnets.

As we know that the default interface, eth0, is attached to an ENI that was created when we launched the instance, and is used to handle all traffic sent and received from the instance.

We can attach a secondary network interface which allows us to connect our EC2 instance to two networks at once.

A common use case for ENIs is the creation of management networks. This allows us to have public-facing applications like web servers in a public subnet but lock down SSH access down to a private subnet on a secondary network interface.

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