Networking in AWS

• Service in AWS which allows us to create networking is VPC (Virtual Private Cloud)

VPC

• VPC is a Network creation Service.

• VPC belongs to a Region

• Machines cannot be directly created in a Region, we need to create subnets in VPC

• Each Subnet belongs to Availability Zone

• All the communications between subnets are allowed by default

• VPC will not be connected to internet by default

• Communications between two vpc’s is not allowed by default

Internet Gateway

• If your VPC requires internet connection in a dual mode then we need internet gateway to be created and attached to VPC

Route Tables

• Route table are much like routers. In this route table you can define rules

Elastic Network Interface (ENI)

• ENI is an interface which connects to VM(Ec2 instance/rds instance) to the subnet
• IP Address will be assigned to ENI