The Functionality template std::async runs the function file asynchronously (perhaps inside a individual thread which could become a part of a thread pool) and returns a std::future that may eventually maintain the results of that functionality contact. 1) Behaves just as if (2) is called with coverage being std::launch::async Can https://alphawireless.com/future-proofing-american-utilities-why-900-mhz-is-critical-for-utility-communications/