A valve, includes an in-line flow passage, a shut-off mechanism, and a multi-stage throttling section disposed in the in-line flow passage. The propylene-based polymer is a propylene homopolymer satisfying the conditions of mmmm=20 to 60 mol %, rrrr\u22660. The file transfer metadata is used to generate a file transfer monitoring criterion that is associated with selectively monitoring the file transfer activity between the first network entity and the second network entity.