what is a peer VPC

A VPC peering connection is a networking feature that allows you to connect two VPCs, allow them to communicate with each other

what is NAT Gateway used for ?

A NAT (Network Address Translation) Gateway is used to enable instances in a private subnet to connect to the internet.

why non relational databases are called no sql databases?

Relational database use which type of scaling?

what type of logs will store in the cloud trail?