NCTI -HSD FINAL-DOJ 2.

NCTI -HSD FINAL-DOJ 2. The first version of the Data Over Cable Service Interface Specification (DOCSIS) was approved as an international standard by what organization? The International Telecommunication Union (ITU). What criteria does the Data Over Cable Service Interface Specification (DOCSIS) certification process ensure? Compliance with the DOCSIS standard and interoperability between suppliers. What layers of the Open Systems Interconnection (OSI) reference model are applied between Data Over Cable Service Interface Specification (DOCSIS) modems and the cable modem termination system (CMTS)? Layers 1 through 4 (Physical layer, Data Link Layer, Network Layer, and Transport Layer) are applied between the DOCSIS modem and CMTS. What access technology does the first version of the Data Over Cable Service Interface Specification (DOCSIS 1.0) use to send data upstream over the network's RF return path? Time division multiple access (TDMA). What was added to the first Data Over Cable Service Interface Specification (DOCSIS) that enabled broadband cable operators to provide telephone service with quality and reliability that rivaled the products of the traditional telephone companies? Quality of service (QoS) controls, enhanced security, and adaptive equalization in the upstream path. What features were introduced with the 3.1 version of the Data Over Cable Service Interface Specification (DOCSIS 3.1) to increase the downstream and upstream data throughput? Orthogonal frequency division multiplexing (OFDM) and low-density parity-check (LDPC). Which Data Over Cable Service Interface Specification (DOCSIS) version was the first to provide an option for raising the top frequency of the upstream spectrum to 85 MHz in order to create enough bandwidth for upstream carriers from modems running on previous DOCSIS versions? DOCSIS 3.0. Why are the data throughput rates for both downstream and upstream in Data Over Cable Service Interface Specification (DOCSIS) networks asymmetrical? Because the narrower bandwidths and lower orders of modulation for the return path carriers cause the DOCSIS downstream and upstream data rates to be unequal or asymmetrical. Which Open Systems Interconnection (OSI) reference model layers does the MAC Layer in the Data Over Cable Service Interface Specification (DOCSIS) overlap? The Physical and Data Link Layers. From where do Data Over Cable Service Interface Specification (DOCSIS) modems receive their configuration files, billing system messages, and access control messages? From the cable modem termination system (CMTS) acting as a "proxy" or messenger that transfers messages and files between the modems and the respective servers.