Subnets — AWS Solutions Architect Associate Practice Questions

Subnets are subdivisions of a VPC's CIDR block, each associated with a single Availability Zone, and they determine where resources reside and what network access they have. The exam distinguishes public subnets (associated with a route to an Internet Gateway, used for load balancers and bastion hosts) from private subnets (no direct internet route, used for application servers and databases). You need to understand CIDR notation, subnet sizing trade-offs, and how route tables, NAT Gateways, and VPC endpoints are associated with subnets to control traffic flow. Placing resources in the correct subnet type is a foundational element of secure and properly functioning AWS architectures.

Free questions on subnets