Production Blueprint · Industry-standard pattern
A three-tier network: public, private and isolated subnets
The standard shape of a production web application in the cloud: only the load balancer faces the internet, the application runs in a private subnet, and the database sits in a subnet with no route out. Names are given for AWS and Azure.
DNSCDN / WAFLoad balancerSubnetsSecurity groups / NSGsNAT gatewayBastionDatabase
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Here is what's inside:
- The network layers
- A request's journey
- What each layer is for
- Where it goes wrong
- The interview talk track
- What I'd improve next
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