1 of 21

56K Modems maximum Uploading data rate is 40K.�True�False

2 of 21

Unused bandwidth between channels to prevent signals from overlaping is called _____________.�Frequency�Time Period�Guard Bands�Spectrum 

3 of 21

The __________ converts the signal to a format appropriate to the transmission medium and introduces it onto the network link.�DCE�DTE�DCE & DTE�None of the given

4 of 21

Data rate limitation of traditional modems is 6KHz..�True�False

5 of 21

No addressing is necessary in asynchronous TDM.�False�True

6 of 21

Telephone network is an example of a __________ network.�Packet-switched�Circuit-sw itched�Message-switched�Tele-switched

7 of 21

___________ uses a series of filters to decompose multiplexed signal into its constituent signals.�MUX�DEMUX�DELUX�any of the given

8 of 21

Time slots are dynamically allotted in _______________TDM technique.�FDM�Asynchronous�WDM�Synchronous

9 of 21

Data rate limitation of traditional modems is 6KHz..�True�False

10 of 21

Bit stuffing is the process in which extra bits are___________.�Removed�Added�Added and Removed�None of the above 

11 of 21

 WDM stands for�Wave Division Multiplexing�Wrong Division Multiplexing�Well Division Multiplexing�West Division Multiplexing

12 of 21

TROPOSHERE is the portion of the atmosphere extending outwards approx. 30 miles from the earth.� True� False

13 of 21

Bandwidth required for the ASK is equal to the __________ of the signal.�Baud rate�Frequency�Period�Phase

14 of 21

 Effective bandwidth of telephone line used for data transmission is 2400 Hz covering a range from 600 Hz to 3000 Hz..�1500 Hz�1200 Hz�2000 Hz�2400 Hz 

15 of 21

TROPOSHERE is the layer of atmosphere above the troposhere but below space.�True�False

16 of 21

A ______________ modem is used to connect two DTEs directly.�NULL�Cable�DSL�None of the given 

17 of 21

STP can eliminate a phenomenon called Crosstalk.�True�False 

18 of 21

Mechanical specifications of _________ define a combination of two connectors , on with 37 pins and one with 9 pins for a combined 46 pins.�EIA 558�EIA 854�EIA 302�EIA 448

19 of 21

 A traditional telephone line has a bandwidth of __________.�2000 Hz�4000 Hz�2000 MHz�4000 MHz 

20 of 21

Speed of light in a vacuum.�200000 Km/sec�300000 Km/sec�600000 Km/sec�None of Given

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