For data that's mostly to do with the the API provided by the particular mongodb driver, than mongodb itself. Mongo stores and transmits BSON, not JSON. Most mo

For data that's mostly to do with the the API provided by the particular mongodb driver, than mongodb itself. Mongo stores and transmits BSON, not JSON. Most mongo drivers expose an API that serialises your data to BSON for writes and wraps the BSON data with a JSON-like interface for reads.