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Subnets

VPCs partitioned into multiple subnets: public, private (services), private (persistence)VPCs partitioned into multiple subnets: public, private (services), private (persistence)

Each VPC is partitioned into one or more subnets (sub-networks). Each subnet controls a portion of the VPC’s CIDR range. For example, a VPC with the CIDR block 10.10.0.0/16 (all IPs from 10.10.0.0 - 10.10.255.255) might be partitioned into two subnets, one with the CIDR block 10.10.0.0/17 (all IPs from 10.10.0.0 - 10.10.127.255) and one with CIDR block 10.10.128.0/17 (all IPs from 10.10.128.0 - 10.10.255.255). Note that subnets in the same VPC are not allowed to have overlapping CIDR ranges.