Glossary term
What is subnet? Meaning for developers
In DevOps
A slice of a VPC's address range that lives in one Availability Zone. It is public if its route table sends 0.0.0.0/0 to an Internet Gateway, otherwise private.
Learn it properly · DevOpsLesson 6: VPC: Subnets, Route Tables, Security GroupsYour own private network inside AWS. Public and private subnets, how traffic gets in and out, and where your database hides.In System Design
A section of a network's IP range. Example: Public subnet for load balancers, private for apps.
Learn it properly · System DesignLesson 57: Cloud Fundamentals: Regions, AZs & ServerlessServers that once took months to order now take minutes — but the cloud has its own concepts, failure modes and surprise bills. Regions and availability zones, IaaS to SaaS, serverless and cold starts, the shared responsibility model, cost, and infrastructure as code.In Networking for Developers
A block of addresses that belong together, such as one office network or one cloud zone.
Learn it properly · Networking for DevelopersLesson 1: IP Addresses, Subnets, NAT and RoutingIPv4 and IPv6, CIDR notation worked by hand, private ranges, NAT, routing tables and how a packet finds its way.