19Modem registrationThe process the Toshiba Cable Modem uses to make itself known to the headendequipment. Once authorized by the router, the modem is assigned upstream anddownstream channels for data communication.Network driverA (software) file included with the Ethernet card. The file is loaded on the computer toallow the computer to recognize the Ethernet card. See Ethernet Card.RJ-45Connector on the Toshiba Cable Modem, labeled 10BASE-T, that connects themodem to a computer or to a HUB.SubscriberA computer user in the home who accesses a data service using the Toshiba CableModem.SubnetA network subdivision. When subnetting us used, the IP (Internet Protocol) address isdivided into a subnet number and a host number. Hosts and gateways identify the bitsused for the network and subnet number through the use of a subnet mask.TCP/IP communication stackSoftware in the subscriber computer that processes packets through thecommunication layers. The subscriber configures the IP address for the computer andthe router default gateway in the software. The TCP/IP communication stack handlesall the communications with the subscriber’s application.USBUniversal Serial Bus, standardized for easy connections between the PC and theother peripherals. USB connects more than computers and peripherals.