What is the difference between a CSU/DSU and a modem?（）A、A CSU/DSU converts analog signals from a router to a leased line; a modem converts analog signals from a router to a leased line.B、A CSU/DSU converts analog signals from a router to a phone line; a

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What is the difference between a CSU/DSU and a modem?（）

A、A CSU/DSU converts analog signals from a router to a leased line; a modem converts analog signals from a router to a leased line.
B、A CSU/DSU converts analog signals from a router to a phone line; a modem converts digital signals from a router to a leased line.
C、A CSU/DSU converts digital signals from a router to a phone line; a modem converts analog signals from a router to a phone line.
D、A CSU/DSU converts digital signals from a router to a leased line; a modem converts digital signals from a router to a phone line.

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相似问题和答案

第1题：

WhichofthefollowingdevicessetstheframingtypeonaT1circuit?()

A.Transceiver

B.GatewayModem

C.Router

D.CSU/DSU

参考答案：D

第2题：

Which ISDN device converts the four－wire BRI signals from an S／T interface into two－wire signals of a U interface?()

A.TE1

B.NT-2

C.TA

D.TE2

E.NT-1

参考答案：E

第3题：

路由器出现Serialinterface－numberisup,lineprotocolisdown(DTE)的状态,可能出现的问题不包括()。

A.本地或远程路由器配置丢失

B.线路故障

C.CSU/DSU故障

D.LINE未与CSU/DSU联接

参考答案：D

第4题：

Which of the following describes the roles of devices in a WAN (Choose three.)()。

A.A CSU/DSU terminates a digital local loop.

B.A modem terminates a digital local loop.

C.A CSU/DSU terminates an analog local loop.

D.A modem terminates an analog local loop.

E.A router is commonly considered a DTE device.

F.A router is commonly considered a DCE device.

参考答案：A, D, E

第5题：

Which of the following describes the roles of devices in a WAN? ()

A.A CSU/DSU terminates a digital local loop

B.A modem terminates a digital local loop

C.A CSU/DSU terminates an analog local loop

D.A modem terminates an analog local loop

E.A router is commonly considered a DTE device

F.A router is commonly considered a DCE device

参考答案：A, D, E

第6题：

Digital data can also be represented by (71)signals by use ofa modem. The modem converts a series of binary voltage (72) into an analog signal by encoding the digital data ontoa carrier frequency. The resulting signal occupies a certam spectrum of (73) centered about the carTier and may be propagated acrossa medium suitable for that carrier. The most common modems represent digital data in the voice(74)and hence allow those datato be propagated over ordinary voice-grade (75 )lines At the other end of the line, another modem demodulates the signal to recover the original data

(71)

A.analog

B.digital

C.Modem

D.electric

正确答案：A
数字数据也可以通过调制解调器用模拟信号来表示。调制解调器把数字数据编码为一种载波频率，从而可以把二进制电压序列转换为模拟信号。产生的信号占用了以某一频率为中心的载波频带，可以通过适合于该载波的介质进行传播。大多数通用的调制解调器表示话音频带的数字数据，因而允许这些数据在通常的话音级电话线路上传播。在线路的另一端，另外一个调制解调器对信号进行解调并恢复原来的数据。

第7题：

What is the difference between a CSU／DSU and a modem?()

A. A CSU/DSU converts analog signals from a router to a leased line; a modem converts analog signals from a router to a leased line.

B. A CSU/DSU converts analog signals from a router to a phone line; a modem converts digital signals from a router to a leased line.

C. A CSU/DSU converts digital signals from a router to a phone line; a modem converts analog signals from a router to a phone line.

D. A CSU/DSU converts digital signals from a router to a leased line; a modem converts digital signals from a router to a phone line.

参考答案：D

第8题：

As a network administrator, you will need to decide on the appropriate network devices to use. Which of the following correctly describes the roles of devices in a WAN? (Choose three)

A. A CSU/DSU terminates a digital local loop.

B. A router is commonly considered a DCE device.

C. A modem terminates an analog local loop.

D. A router is commonly considered a DTE device.

E. A modem terminates a digital local loop.

F. A CSU/DSU terminates an analog local loop.

G. A modem is used to terminate a T1

正确答案：ACD
A,C,D

第9题：

When a router is connected to a Frame Relay WAN link using a serial DTE interface, how is the interface clock rate determined()。

A.It is supplied by the CSU/DSU.

B.It is supplied by the far end router.

C.It is determined by the clock rate command.

D.It is supplied by the Layer 1 bit stream timing.

参考答案：A

第10题：

Which three functions are associated with a Cisco Unified CallManager？（）

A、 connects traditional telephony devices to voice over IP infrastructure
B、 converts analog signals to digital format
C、 performs voice compression
D、 performs call processing
E、 performs dial plan administration
F、 performs signaling and device control

正确答案:D,E,F

What is the difference between a CSU/DSU and a modem?（）A、A CSU/DSU converts analog signals from a router to a leased line; a modem converts analog signals from a router to a leased line.B、A CSU/DSU converts analog signals from a router to a phone line; a

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