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名词解释题
Modem
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考题
下列关于modem的说法正确的是()。
A.Modem仅用于把数字信号转换成模拟信号，并在线路中传输B.Modem是对传输信号进行A/D和D/A转换的设备C.Modem是一种数据通信设备D.56Kbps的Modem的下传速率比上传速率大
考题
当计算机需要通过相连的Modem发送数据时，依次设置的信号是______。A．Modem就绪→DTE就绪→请求发送→允许发送→发数据→请请求发送→请允许发送→请Modem就绪→请DTE就绪B．Modem就绪→DTE就绪→请求发送→允许发送→发数据→请请求发送→请允许发送→请DTE就绪→请Modem就绪C．DTE就绪→Modem就绪→请求发送→允许发送→发数据→请请求发送→请允许发送→请Modem就绪→请DTE就绪D．DTE就绪→Modem就绪→请求发送→允许发送→发数据→请请求发送→请允许发送→请DTE就绪→请Modem就绪
考题
文中（ 5 ）处正确的答案是（ ）。A．MODEM就绪→DTE就绪→请求发送→允许发送→发数据→请求发送→请允许发送→请MODEM就绪→请DTE就绪B．MODEM就绪→DTE就绪→请求发送→允许发送→发数据→请求发送→请允许发送→清DTE就绪→清MODEM就绪C．DTE就绪→MODEM就绪→请求发送→允许发送→发数据→请求发送→请允许发送→请MODEM就绪→请DTE就绪D．DTE就绪→MODEM就绪→请求发送→允许发送→发数据→请求发送→请允许发送→清DTE就绪→清MODEM就绪
考题
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
考题
下列关于软Modem的描述中，正确的是______。A．软Modem就是用软件模拟Modem，无需额外的硬件设备就能连网的ModemB．大多数的外置Modem和USB接口的Modem都是软ModemC．软Modem将大部分任务交由CPU来完成，会占去一部分系统资源D．软Modem价格比硬Modem稍贵
考题
下列关于软Modem的描述中，正确的是( )。A．软Modem就是软件模拟Modem，无需额外的硬件设备就能联网的ModemB．大多数的外置Modem和USB接口的Modem都是ModemC．软Modem将大部分任务交由CPU来完成，会占去一部分系统资源D．软Modem价格比硬Modem稍贵
考题
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
考题
During the modem boot process，how does the modem acquire the downstream channel？（）A、The modem is commanded by the CMTS to set to the specific channelB、The modem uses the default value in the broadcom chipsetC、The modem tuner sets a level as defined by the DOCSIS specificationD、The modem tuner scans the downstream spectrum until digital QAM modulated signal is encountered
考题
下面各说法中的（）是正确。A、内置式Modem比外置式Modem更易于用户监控B、外置式Modem比内置式Modem更易于用户监控C、内置式Modem比外置式Modem工作速度快D、外置式Modem比内置式Modem工作速度快
考题
What does AMR stand for?（）A、Audio Modem RiserB、Audio Modem RectifierC、Audio Multiplication RectifierD、Audio Modern Riser
考题
You are the network administrator for TestKing.com. The network contains two Windows Server 2003 computers named TestKing7 and TestKing8. You install a new modem on TestKing7 to allow an application to dial out to your pager. You install the driver. When you test the modem, it does not dial out successfully. You install an identical hardware and driver configuration on TestKing2, and the modem dials out successfully. You need to find out if the modem card in TestKing7 is defective. What should you do on TestKing7?（）A、In Device Manager, right-click the modem, and then click Scan for hardware changes.B、In Modem Properties, click the Modem tab, and then set the maximum port speed to the same value as the value for the maximum port speed on TestKing8.C、In Modem Properties, click the Diagnostics tab, and then click the Query Modem button.D、In Device Manager, right-click Ports, and then click Scan for hardware changes.
考题
单选题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
考题
单选题During the modem boot process，how does the modem acquire the downstream channel？（）A
The modem is commanded by the CMTS to set to the specific channelB
The modem uses the default value in the broadcom chipsetC
The modem tuner sets a level as defined by the DOCSIS specificationD
The modem tuner scans the downstream spectrum until digital QAM modulated signal is encountered
考题
多选题When a computer does not recognize an internal modem， a technician should determine whether：（）Athe modem is seated properly.Bthe number being dialed is valid.Cthere are resource conflicts.Dthere is power to the modem.Ethe modem speaker is enabled.
考题
单选题ADSL用户端设备包括（）。A
ADSL MODEM和信号放大器B
56KB，MODEM和电话机C
ADSL MODEM和语音分离器D
ADSL MODEM和整流器
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