CS601 Midterm Current Paper VU Fall 2011 (www.ivusolutions.com)
FALL 2011 MID – TERM
CS601 DATA COMMUNICATION
DATE: 26 November 2011
TIME: 10 : 00 AM
Question No. 1: _______ is a multi point topology
Ring
Mesh
Tree
Bus
Question No. 2: Unidirectional traffic movement is overcome by dual ring technology.
True
False
Question No. 3: The _______ layer changes bits into electromagnetic signals.
Physical
Data Link
Transport
None of given
Question No. 4: In 8QAM each signal shift one baud represents________.
4 bits
2 bits
5 bits
3 bits
Question No. 5: In ________ transmission bits are transmitted over a single wire one at a time.
Asynchronous serial
Synchronous serial
Parallel
Asynchronous & Synchronous
Question No. 6: At the _________ layer a DCE takes data generated by DTE.
Physical
Transport
Data Link
Application
Question No. 7: In RS422 balanced mood two lines carry ________ signals which are not identical to each other.
Same
Different
Digital
Analog
Question No. 8: Standard orientation committee has _______ organization.
2
3
4
None of above
Question No. 9: Converting binary bits into digital signal is ____________
Analog to Digital
Digital to Analog
Digital to Digital
Analog to Analog
Question No. 10: Frequency band in which 99% of the total power resides is called _________.
Power bandwidth
Half power bandwidth
3db bandwidth
F.M
Question No. 11: The vertical distance from a given point on the wave form to the horizontal axis is called __________ of the
signal.
Phase
Amplitude
Frequency
None of above
Question No. 12: Which one is not element of protocol.
Semantics
Timing
Common service Module
Question No. 13: The ________ layer is responsible for delivery of message from one process to another.
Transport Layer
Network Layer
Session Layer
Application Layer
Question No. 14: Dividing data into manageable parts or data chunks is ______________.
Packetizing
Framing
Both
None
Question No. 15: ________ is measured on the horizontal axis in time domain plot.
Time
Phase
Frequency
Signal
Question No. 16: What is the protocol data unit (PDU) employed at the network layer?
Segments
Packets
Frames
Bits
Question No. 17: Give the names of any two devices that can be used for connecting among following situations:
LAN to LAN
LAN to WAN
MAN to WAN
Question No. 18: Phase Modulation is one of the methods used for :
Analog to Digital Conversion
Analog o Analog Conversion
Digital to Analog Conversion
Question No. 19: What will be the frequency of a signal completing 10 cycle in one second?
Question No. 20: If 64 bits are sent over transmission medium in one second, what will be the bit rate and bit interval?
Question No. 21: How does DTE and DCE works together for end to end communication?
Question No. 22: Using HDB3 scheme, encode the signal “1100001011”
Question No. 23: Give advantages and disadvantages of Asynchronous and Synchronous transmission. Compare the both strategies.
