ABSTRACT
Despite this superficial similarity with analog modems, however, cable modems are a bit more complicated. They include a tuner to separate the data signal from the TV broadcast stream (integrated with a diplexer to allow for both upstream and downstream signals) as well as components from network adapters, bridges, and routers so you can connect to multiple computers. Network management software runs on cable modems so your friendly local cable company can monitor its operations, and encryption is used to prevent your data from being intercepted by some one else.
