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VPC IN AWS - Coggle Diagram
VPC IN AWS
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2) Describe CIDR Blocks
a) Secondary CIDR Blocks
- When you create a VPC, you must specify an IPv4 CIDR block for the VPC. The allowed block size is between a /16 netmask (65,536 IP addresses) and /28 netmask (16 IP addresses).
- The CIDR block of a subnet can be the same as the CIDR block for the VPC (for a single subnet in the VPC), or a subset of the CIDR block for the VPC (for multiple subnets)
b) IPv6 CIDR Blocks
- can associate a single IPv6 CIDR block with an existing VPC in your account, or when you create a new VPC
- The CIDR block is a fixed prefix length of /56. You can request an IPv6 CIDR block from Amazon's pool of IPv6 addresses.
- If you've associated an IPv6 CIDR block with your VPC, you can associate an IPv6 CIDR block with an existing subnet in your VPC, or when you create a new subnet. A subnet's IPv6 CIDR block is a fixed prefix length of /64.
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1) What is VPC
- A virtual private cloud (VPC) is a secure, isolated private cloud hosted within a public cloud. VPC customers can run code, store data, host websites, and do anything else they could do in an ordinary private cloud, but the private cloud is hosted remotely by a public cloud provider. (Not all private clouds are hosted in this fashion.) VPCs combine the scalability and convenience of public cloud computing with the data isolation of private cloud computing.