Layer 7 — AWS Solutions Architect Associate Practice Questions
Layer 7 refers to the application layer of the OSI model, where protocols such as HTTP, HTTPS, and gRPC operate, and where content-aware routing decisions can be made based on the payload of a request. On the Solutions Architect Associate exam, Layer 7 is most relevant in the context of the Application Load Balancer, which inspects HTTP headers, paths, and hostnames to route traffic intelligently to different target groups. Understanding the distinction between Layer 4 (transport-layer, TCP/UDP) and Layer 7 (application-layer) load balancing helps candidates choose between ALB and Network Load Balancer for a given use case. Exam questions may describe routing requirements such as directing API calls to one service and web requests to another, which is a Layer 7 routing capability.