Organization of a polled network different from that of an internetwork :

The physical components of this system consisted of terminals, printers, communications controllers, multiplexers, and front-end processors. Front-end processors are connecting between the host (mainframe) system and the communications lines. They managed all of the communications overhead including polling each of the communications controllers, which in turn polled each of their attached terminals. This architecture or network is called as polled network.

DARPAnet(now it is called as Internet) was that it created a uniform protocol for communications between dissimilar hosts along networks of differing speeds. Because it connected many different kinds of networks, DARPAnet was said to be an internetwork.