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Layer 7 vs Layer 4 trade-offs for SDK-provisioned traffic: what CreateLoadBalancer Type application vs network actually changes, and how to choose.
Hands-on ELB v2 basics: create an ALB, wait for it to be active, create a target group, register a target, add a listener, and check target health in both SDKs.
Path- and host-based routing on an ALB via the SDK: create a listener, add prioritized CreateRule conditions, use redirect and fixed-response actions, and order rules correctly.
Provision a Network Load Balancer via the SDK for Layer 4 TCP/UDP traffic and fixed addressing: SubnetMappings for static private IPs or Elastic IPs, TCP/UDP listeners, and target groups.
The ELB v2 SDK habits that make load balancers safe and cheap: pick the right type, design shallow health checks, tune draining for zero-downtime deploys, enforce modern TLS, and clean up.