Today, modems not only run faster, they are also loaded with features like error control and data compression. Suddenly, you are confronted with all the buzzwords: V.32, V.32bis, V.42, V.42bis, MNP-5, LAP-M, etc. What do they mean? And what do they mean to you? To make the most of a high-speed modem, you need to understand three different kinds of protocols and the relationships among them. They are the modulation protocols, error control protocols and data compression protocols.