Is MPLS public or private with regard to PCI?

Unfortunately, according to “guidance” from the official PCI website, the answer to the question is, “It depends.”  Oh how I loathe the ambiguity of PCI (and most other regulations). In general, MPLS networks are considered “private” networks and do not require encryption. This, however, is dependent upon the specific provider and/or configuration. I haven’t been [...]