Blog: CS601Data Communication Quiz 23 to 30 lectures

Question No. 1
 WDM stands for:

Wave Division Multiplexing
Wrong Division Multiplexing
Well Division Multiplexing
West Division Multiplexing


Question No.2
A portion of the path that carries TX b/w a given pair of devices is known as __________.   

Node
Bridge
Channel
Access Point


Question No.3
Asynchronous TDM is efficient only when the size of the time slot is kept relatively ________ 

Large
Small
Medium
Zero


Question No.4
A traditional telephone line has a bandwidth of __________.   

2000 Hz
4000 Hz
2000 MHz
4000 MHz


Question No.5
Swithched analog service is leased line.

True
False


Question No.6
 In Synchronous TDM, Time slots are not same in number as input devices.

True
False


Question No.7
Frequency Division Multiplexing technique is used for _______________ signal 

Analog
Digital
Analog and Digital
Non of the above 


Question No.8
TROPOSHERE is the layer of atmosphere above the troposhere but below space 

True  
False


Question No.9
STP can eliminate a phenomenon called Crosstalk

True
False


Question No.10
Telephone network is an example of a __________ network

Packet-switched
Circuit-switched
Message-switched
Tele-switched


Question No.11
TROPOSHERE is the portion of the atmosphere extending outwards approx. 30 miles from the earth 

True
False 


Question No.12
Which of the following techniques takes data from one high speed line and breaks it into portions? 

Inverse subtraction
Inverse addition
Multiplexing
Inverse multiplexing


Question No.13
In 56K Modems Max Uploading speed is ______ bytes and downloading speed is ______ byte. 

40K, 56K
33.6K, 56K
56K, 33.6K
None of above


Question No.14
56K Modems maximum Uploading data rate is 40K. 

True  
False


Question No.15
Unused bandwidth between channels to prevent signals from overlaping is called _____________. 

Frequency
Time Period
Guard Bands
Spectrum


Question No.16
Cable that connects the subscriber telephone to the nearest end office in a local loop is called 

Twisted-pair cable
Coaxial cable
Fiber-optic cable
Subscriber cable


Question No. 17
In Digital Data Service, maximum data rate is

50kbps
64kbps
33kbps
All of above


Question No.18
Classes of Transmission Media are _________

Electromagnetic Spectrum
Coxial and Twisted Cable Media
Guided and Unguided Media
None of Given


Question No. 19
Data rate limitation of traditional modems is 6KHz.


True
False


Question No. 20
There are ________ basic categories of multiplexing.

3
4
2
5


Question No. 21
Modem standards are _______________.

Cable Modems
Bell and ITU-U Modems
Traditional and 56K Modems
None of given


Question No. 22
Multiplexing is the set of techniques that allows simultaneous TX of multiple signals across a ___________ data link

Single
Double
Multiextending
None of the given
 

Question No.23 
Time slots are dynamically allotted in _______________TDM technique.

FDM
Asynchronous
WDM
Synchronous


Question No. 24
A prism can deflect the light depending upon the angle of ____________ and the frequency. 

Deviation
Incident
Refraction
Reflection


Question No. 25
___________ uses a series of filters to decompose multiplexed signal into its constituent signals. 

MUX
DEMUX
DELUX
any of the given


Question No.26

Permanent analog connection between two subscribers is called. ________________.   
Switched/ 56 Service
Analog Leased Service
DDS
DS


Question No. 27
STP is less expensive than UTP and is less susceptible to noise 

True
False

 
Question No. 28
Speed of light in a vacuum

200000 Km/sec
300000 Km/sec
600000 Km/sec
None of Given


Question No. 30
Light source can either _____ or ______. 

ELD, LID
LED, LID
ELD, ILD
LED, ILD


Question No. 31
No addressing is necessary in asynchronous TDM.   

False
True 


Question No. 32
Inverse multiplexing and De multiplexing are different.

True
False