Meaning – The term M-bit, refers to More- databit. In X.25 communication, the bit in a data packet indicates that there is more data to follow in another data packet when a message is too large for one packet.
The M-bit is very useful when there is a large file that is being transferred in parts. Sometimes, the user may choose to segregate the file into parts to enable faster transfer between devices, and as such, it is important that the recipient computer knows that there is more data to follow. This is why there is an M-Bit in each of these parts.
Example of usage – “The M-bit is very underrated and most people don’t know it exists, but it is because of this M-bit, that a segregated file transfer results in the files being collected in the right memory locations.”