Difference between an internet gateway, NAT gateway and Egress-only gateway.

What is NAT gateway? Is it a free tier service of AWS?

What is Egress-only gateways? What are its characteristics?

An egress-only internet gateway allows outbound communication using IPv6 from instances in the VPC to the internet, and prevents the internet from initiating an IPv6 connection with the instances.

Name the storage system in AWS used by Netflix.

Netflix uses the S3 storage of the AWS.

Give the command to check your current directory in Linux CLI

pwd