Summary

• Every AWS region comprises two or more AZs.
• Subnet is short for subnetwork. A network is subdivided into multiple logical parts for controlling access to individual logical subparts of the network, which are called subnets.
• A private subnet is a subset of a network wherein resources are isolated and restricted for access from within the VPC.
• Any incoming traffic from the internet cannot directly access the resources within a private subnet.
• Similarly, outgoing traffic from a private subnet cannot directly access the internet.
• A public subnet is a subset of a network wherein resources within a subnet are isolated and can be accessed from within the VPC as well as from the internet.
• A private IP address cannot be reached over the internet.
• When an instance is launched, Amazon uses DHCP to assign a private IP address to the instance.
• Unlike a private IP address, a public...