ZeroMQ is not really at TCP level, ZeroMQ is about sending messages to and from various semantic endpoints, such as REP and REQ sockets, specifically made for d

ZeroMQ is not really at TCP level, ZeroMQ is about sending messages to and from various semantic endpoints, such as REP and REQ sockets, specifically made for doing RPC. If I was using TCP, I'd have to do a _lot_ of work myself (keeping the connection up, throttling locally when it's not up, keeping track of which messages goes where, etc).