简述Cable Modem系统。
简述Cable Modem系统。
相关考题：
下列关于光纤同轴电缆混合网HFC的描述中，错误的是( )。A) HFC是一个双向传输系统B) Cable Modem利用频分多路复用方法将信道分为上行信道与下行信道C) Cable Modem传输方式分为对称式和非对称式两类D) HFC通过Cable Modem将光缆与同轴电缆连接起来
关于下行传输速率由低到高排序，哪一个是正确的?A.普通Modem拨号=DDN〈 ISDNB.普通Modem拨号〈 DDN〈 Cable MODEMC.普通Modem拨号〈 ADSL 〈 ISDND.DDN 〈 Cable Modem〈 ADSL
下列关于光纤同轴电缆混合网HFC的描述中，错误的是A．HFC是一个双向传输系统B．Cable Modem利用频分多路复用方法将信道分为上行信道与下行信道C．Cable Modem传输方式分为对称式和非对称式两类D．HFC通过Cable Modem将光缆与同轴电缆连接起来
Which of the following is the proper order for powering off and on network components?() A. Computer cable modem routerB. Cable modem router computerC. Cable modem computer routerD. Router cable modem computer
Which of the following WAN technologies uses a telephone cable?() A.POTSB.FDDIC.SONETD.Cable modem
通过HFC网络实现宽带接入，用户端需要的设备是（ ），局端用于控制和管理用户的设备是（ ）。A.Cable Modem B.ADSL Modem C.OLT D.CMTS A.Cable Modem B.ADSL Modem C.OLT D.CMTS
下列选项中，关于Cable Modem的描述不正确的是( )。A．Cable Modem利用时分复用的方法B．上行信道为从计算机终端到网络方向C．下行信道为从网络到计算机终端方向D．Cable Modem可以分为双向对称式传输和非对称式传输
下列选项中，关于Cable Modem的类型叙述不正确的是( )。A．从传输方式分，Cable Modem可分为双向对称式传输和非对称式传输B．从同步方式分，Cable Modem可分为同步交换和异步交换C．从接入角度分，Cable Modem可分为单向和双向D．从接口角度分，Cable Modem可分为外置式、内置式和交互式机顶盒
Which of the following is the proper order for powering off and on network components?（）A、Computer cable modem routerB、Cable modem router computerC、Cable modem computer routerD、Router cable modem computer
Which of the following WAN technologies uses a telephone cable?（）A、POTSB、FDDIC、SONETD、Cable modem
Which two statements are true about broadband cable （HFC） systems？（）A、Cable modems only operate at Layer 1 of the OSI model.B、Cable modems operate at Layers 1 and 2 of the OSI model.C、Cable modems operate at Layers 1， 2， and 3 of the OSI model.D、A function of the cable modem termination system （CMTS） is to convert the modulated signal from the cable modem into a digital signal.E、A function of the cable modem termination system is to convert the digital data stream from the end user host into a modulated RF signal for transmission onto the cable system.
多选题Which two statements are true about broadband cable （HFC） systems？（）ACable modems only operate at Layer 1 of the OSI model.BCable modems operate at Layers 1 and 2 of the OSI model.CCable modems operate at Layers 1， 2， and 3 of the OSI model.DA function of the cable modem termination system （CMTS） is to convert the modulated signal from the cable modem into a digital signal.EA function of the cable modem termination system is to convert the digital data stream from the end user host into a modulated RF signal for transmission onto the cable system.
单选题关于ADSL与Cable Modem的特性，下列叙述何者错误？（）AADSL为非对称带宽传输，Cable Modem为对称带宽传输BADSL使用电话线，Cable Modem使用有线电视线CADSL的带宽为独享式，Cable Modem的带宽为共享式DADSL与Cable Modem都可做双向的传输
单选题Which of the following is the proper order for powering off and on network components?（）AComputer cable modem routerBCable modem router computerCCable modem computer routerDRouter cable modem computer
问答题Cable Modem系统结构说明。