VPC Configuration Basics
To effectively use AWS VPCs, you need to understand the available VPC configuration options, which include IP addressing, subnetting, the use of AZs and Regions, and the choice between default and custom VPCs. You will first learn about how IP addresses are assigned and how Classless Inter-Domain Routing (CIDR) notation is used to control the available IPs within subnets.
CIDR Notation
CIDR notation is a compact and efficient way to represent IP address ranges and subnet masks in IPv4 addressing. It is widely used for network design, routing, and specifying IP address allocations. CIDR notation is particularly valuable because it allows for flexibility in dividing and allocating IP addresses without relying on traditional class-based addressing (class A, B, and C networks).
In CIDR notation, an IP address range is represented as follows:
IPAddress/PrefixLength
IPAddress: This is the base IP address that represents the network or subnet....
