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______ is a device which enables digital microcomputers to communicate across analog telephone lines.
A．The repeater
B．The modem
C．The hub
D．The printer
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更多 “ ______ is a device which enables digital microcomputers to communicate across analog telephone lines.A．The repeaterB．The modemC．The hubD．The printer ” 相关考题
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● (66) is a channel's capacity which directly reflects the data transfer rate of the channel. (67) functions in a NetWare network which is used to define addressing schemes. (68) is a network layer device that suports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains. (69) 。is the popular LAN develped under the direction of the IEEE 802.3. (70) is a device which enables digital microcomputers to communicate across analog telephone lines.(66) A．The volumeB．The bandwidthC．The noiseD．The delay(67) A．NetBEUIB．IPC．IPXD．NCP(68) A．The repeaterB．The hubC．The bridgeD．The router(69) A．Token RingB．Token BusC．EthernetD．FEEI(70) A．The repeaterB．The modemC．The hubD．The printer
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●For each blank, choose the best answer from the four choices and write down on the answer sheet.(71) is a channel's capacity which directly reflects the data transfer rate of the channel.(72) functions in a NetWare network which is used to define addressing schemes.(73) is a network layer device that supports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains.(74) is the popular LAN developed under the direction of the IEEE802.3.(75) is a device which enables digital microcomputers to communicate across analog telephone lines.(71) A．The volumeB．The bandwidthC．The noiseD．The delay(72) A．NetBEUIB．IPC．IPXD．NCP(73) A．The repeaterB．The hubC．The bridgeD．The router(74) A．Token RingB．Token BusC．EthernetD．FDDI(75) A．The repeaterB．The modemC．The hubD．The printer
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Digital computer is controlled by internally stored programs and(66) of using common storage for all or part of a program and also for all or part of the data necessary for the execution of the programs; executing user-written or user-designated programs; performing user-designated manipulation of digitally represented discrete data, including.(67) operations and logic operations; and executing programs that(68) themselves during their execution.Analog computer's operations are analogous to the(69) of another system and that accepts, processes, and produces analog data.(70) computer integrates analog computer components and digital computer components by interconnection of digital-to-analog converters and analog-to-digital converters.A．qualifiedB．competentC．capableD．able
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is a channel' s capacity which directly reflects the data transfer rate of the channel.(67)functions in a NetWare network which is used to define addressing schemes.(68)is a network layer device that suports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains.(69)．is the popular LAN develped under the direction of the IEEE 802.3.(70)is a device which enables digital microcomputers to communicate across analog telephone lines.A．The volumeB．The bandwidthC．The noiseD．The delay
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The(66)is a channel's capacity which directly reflects the data transfer rate of the channel.(67)functions in a NetWare network which is used to define addressing schemes.The(68)is a network layer device that supports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains.(69)is the popular LAN developed under the direction of the IEEE802.3.The(70 is a device which enables digital microcomputers to communicate across analog telephone lines.A．volumeB．bandwidthC．noiseD．delay
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is a device which enables digital microcomputers to communicate across analog telephone lines.A．The switchB．The modemC．The hubD．The repeater
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Which two statements are true about analog to digital conversion of voice signals for use in digital telephony networks？（）A、The three required steps in the analog to digital conversion are sampling，encoding，and compression.B、The three required steps in the analog to digital conversion are sampling，quantization，and compression.C、The three required steps in the analog to digital conversion are sampling，quantization，and encoding.D、The output of the sampling process is a pulse code modulation （PCM） signal.E、The output of the sampling process is a pulse amplitude modulation （PAM） signal.
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Which three functions are associated with a Cisco Unified CallManager？ （）A、 connects traditional telephony devices to voice over IP infrastructureB、 converts analog signals to digital formatC、 performs voice compressionD、 performs call processingE、 performs dial plan administrationF、 performs signaling and device control
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Which of the following describes the roles of devices in a WAN?（）A、A CSU/DSU terminates a digital local loopB、A modem terminates a digital local loopC、A CSU/DSU terminates an analog local loopD、A modem terminates an analog local loopE、A router is commonly consideredaDTEdeviceF、A router is commonly considereda DCE device
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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.
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Which of the following describes the roles of devices in a WAN? （）A、A CSU/DSU terminates a digital local loopB、A modem terminates a digital local loopC、A CSU/DSU terminates an analog local loopD、A modem terminates an analog local loopE、A router is commonly considered a DTE deviceF、A router is commonly considered a DCE device
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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 lineB、A CSU/DSU converts analog signals from a router to a phone line; a modem converts digital signals from a router to a leased lineC、A CSU/DSU converts digital signals from a router to a phone line; a modem converts analog signals from a router to a phone lineD、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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Which statement is true about the digital to analog conversion process？（）A、the two steps of digital to analog conversion are decompression and reconstruction of the analog signalB、the two steps of digital to analog conversion are decoding and filteringC、the two steps of digital to analog conversion are decompression and filtering of the analog signalD、the two steps of digital to analog conversion are quantization and decoding
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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.
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Which test checks the transmitter and receiver of a local modem？（）A、data parityB、analog loop backC、local digital loop backD、remote digital loop back
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When comparing analog display inputs to digital display inputs, which of the following is anadvantage that digital has over analog?（）A、Allows for higher brightnessB、More crosstalkC、Sustains higher resolutionsD、Supports widescreen resolutions
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单选题Which statement is true about the digital to analog conversion process？（）A
the two steps of digital to analog conversion are decompression and reconstruction of the analog signalB
the two steps of digital to analog conversion are decoding and filteringC
the two steps of digital to analog conversion are decompression and filtering of the analog signalD
the two steps of digital to analog conversion are quantization and decoding
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多选题Which two statements are true about analog to digital conversion of voice signals for use in digital telephony networks？（）AThe three required steps in the analog to digital conversion are sampling，encoding，and compression.BThe three required steps in the analog to digital conversion are sampling，quantization，and compression.CThe three required steps in the analog to digital conversion are sampling，quantization，and encoding.DThe output of the sampling process is a pulse code modulation （PCM） signal.EThe output of the sampling process is a pulse amplitude modulation （PAM） signal.
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多选题Which of the following describes the roles of devices in a WAN? (Choose three.)（）AA CSU/DSU terminates a digital local loop.BA modem terminates a digital local loop.CA CSU/DSU terminates an analog local loop.DA modem terminates an analog local loop.EA router is commonly considered a DTE device.FA router is commonly considered a DCE device.
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多选题Which three functions are associated with a Cisco Unified CallManager？ （）Aconnects traditional telephony devices to voice over IP infrastructureBconverts analog signals to digital formatCperforms voice compressionDperforms call processingEperforms dial plan administrationFperforms signaling and device control
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多选题Which of the following describes the roles of devices in a WAN?（）AA CSU/DSU terminates a digital local loopBA modem terminates a digital local loopCA CSU/DSU terminates an analog local loopDA modem terminates an analog local loopEA router is commonly consideredaDTEdeviceFA router is commonly considereda DCE device
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多选题Which of the following describes the roles of devices in a WAN?（）AA CSU/DSU terminates a digital local loopBA modem terminates a digital local loopCA CSU/DSU terminates an analog local loopDA modem terminates an analog local loopEA router is commonly considered a DTE deviceFA router is commonly considered a DCE device
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