Final answer:
To peer 4 VPC's, a minimum of 3 peering connections are required.
Step-by-step explanation:
In order to peer 4 VPC's, a minimum of 3 peering connections are required.
A peering connection is a networking connection between two VPC's that enables them to communicate with each other. Each VPC needs a separate peering connection to establish a direct connection with other VPC's.
For example, if you have VPC1, VPC2, VPC3, and VPC4, you would need 3 peering connections: (VPC1-VPC2), (VPC1-VPC3), and (VPC1-VPC4). Each of these peering connections would facilitate the communication between the respective VPC's.