HAProxy can run in two different modes: TCP or HTTP. When operating in TCP mode, we say that it acts as a layer 4 proxy. In HTTP mode, we say that it acts as a layer 7 proxy. To understand the difference, you must first learn about the Open Systems Interconnection (OSI) model, which helps IT pros conceptualize and explain where a piece of software fits in the context of a computer network.
Ask most people what they consider to be the core value of the AWS cloud, and they’ll probably include things like AWS’ scalability and flexibility. While this refers to their public cloud offerings, the same can be said about AWS Outposts—and maybe even more so.