VU Final Term Past Papers
210 solved final term past paper MCQs for CS601 (Data Communication) at Virtual University, each with the correct answer marked. Use them to learn the VU question style and test your recall. An independent study tool — not affiliated with VU.
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Q1. In __________ ARQ, if a NAK is received, only the specific damaged or lost frame is retransmitted.
Q2. Sliding window requires that data frames be transmitted _______________
Q3. Flow control is needed to prevent ___________.
Q4. Error control in the data link layer is based on ________________
Q5. Data link protocols can be divided into ______________ sub-groups.
Q6. For Stop-and-Wait ARQ, for n data packets sent, _______ acknowledgments are needed.
Q7. In data link layer, communication requires at least ___________ devices working together
Q8. A timer is set when _______ is (are) sent out.
Q9. In selective-reject ARQ, only the specific damaged or lost frame is_____________.
Q10. In Go-Back-N ARQ, if frames 4, 5, and 6 are received successfully, the receiver may send an ACK _______ to the sender.
Q11. If the data unit is 111111 and the divisor is 1010, what is the dividend at the transmitter?
Q12. ARQ stands for _______.
Q13. For a sliding window of size n-1 (n sequence numbers), there can be a maximum of __________ frames sent but unacknowledged.
Q14. In CRC there is no error if the remainder at the receiver is ____________
Q15. The Hamming code is a method of __________.
Q16. _________requires the maximum number of I/O ports.
Q17. Unidirectional traffic movement is overcome by dual ring technology.
Q18. Headers are added at layers 1 and 7 of OSI model.
Q19. Internet with small “i” specifies the world wide Network the actual internet.
Q20. Data synchronization is a function related with ___________
Q21. In case of uploading at the switching station, data is converted to digital signal using ___________.
Q22. Transmission media are usually categorized as _____________
Q23. Category 1 UTP cable is most often used in _______ networks.
Q24. The inner core of an optical fiber is __________ in composition.
Q25. Radio wave and microwave frequencies range from _________.
Q26. The _______ is an association that sponsors the use of infrared waves.
Q27. Optical fibers are defined by the ratio of the ___________ of their core to the diameter of their cladding.
Q28. All of popular Fiber optic connectors are ___________ shaped.
Q29. The VLF and LF bands use _________ propagation for communications.
Q30. Which of the following are not used to measure the performance of TX Media.
Q31. A portion of the path that carries TX b/w a given pair of devices is known as __________.
Q32. A prism can deflect the light depending upon the angle of ____________ and the frequency.
Q33. In bit ____________, MUX adds extra bits to a device.
Q34. Need for Addressing makes Asynchronous TDM inefficient for bit or byte ___________.
Q35. _________ takes data from one high speed line and breaks it into portions.
Q36. Multiplexing has long been used as an essential tool in the ____________.
Q37. Which error detection method involves the use of parity bits?
Q38. If odd parity is used for ASCII error detection, the number of 0s per 8-bit symbol is _________
Q39. Error control is both error _________ and error ___________
Q40. ENQ/ACK stands for______________
Q41. In primary-secondary communication ______________ is always the initiator of a session
Q42. Primary device uses ____________ to receive transmission from the secondary devices.
Q43. A timer is set when ___________ is sent out.
Q44. HDLC is an acronym for ______________.
Q45. The address field of a frame in HDLC protocol contains the address of the _______ station.
Q46. The DSAP and SSAP are addresses used by _________ to identify the protocol stacks.
Q47. IEEE divides the base band category into ______ standards.
Q48. We need ____________ to decompose a composite signal into its components.
Q49. _______ is a multipoint topology.
Q50. The Internet model consists of _______ layers.
Q51. As the data packet moves from the lower to the upper layers, headers are _______.
Q52. The inversion of the level at 1 bit is called as __________
Q53. Bi phase encoding is a type of bipolar encoding in which we use two voltage levels.
Q54. ASK, PSK, FSK, and QAM are examples of ________ modulation.
Q55. Amplitude in ASK is more resistive to EMI and Noise.
Q56. Manchester is a type of ____________encoding.
Q57. Zero crossing bandwidth is also called as equivalent noise bandwidth.
Q58. When data are transmitted from device A to device B, the header from A's layer 4 is read by B's _______ layer.
Q59. ________ layer deals with syntax and semantics of information exchange.
Q60. __________representation of links that connect nodes is called as physical topology.
Q61. YMODEM has _________Byte of data unit.
Q62. Which of the following sublyer, resolves the contention for the shared media
Q63. Like 10 Base 5, 10 Base 2 is a _________ topology LAN
Q64. At the CRC generator, __________ added to the data unit after the division process
Q65. In Y-MODEM Multiple files can be sent simultaneously
Q66. Encryption and encoding are the same terms.
Q67. Which is not an element of protocol?
Q68. A telephone network is an example of a __________ network.
Q69. The bit rate always equals the baud rate in which type of signal?
Q70. Secondary hub in a tree must be a passive hub.
Q71. Which of the following primarily uses guided media?
Q72. Ultra high-frequency waves always use __________ propagation.
Q73. Distortion occurs in a ___________ signal.
Q74. The _______ layer is the layer closest to the transmission medium.
Q75. ____________ coordinates the amount of data that can be sent before receiving acknowledgment
Q76. If the ASCII character H is sent and the character I is received, what type of error is this?
Q77. The PDU has no flag fields, no CRC, and no station address
Q78. Repeater is an amplifier, not a regenerator.
Q79. RARP stands for Reverse Address Resolution Protocol.
Q80. The BNC-T connector is a T-shaped device with _______ ports
Q81. There are _________________ types of serial transmission:
Q82. Synchronous transmission has _____________.
Q83. Which of the following is an example of ITU-T modem standards?
Q84. Multiplexing is the set of techniques that allows simultaneous TX of multiple signals across ___________ data link
Q85. A traditional telephone line has a bandwidth of __________.
Q86. In line discipline the initiator first transmits a frame called an ________
Q87. Token Bus has no commercial application in data communications
Q88. Each station in the Token Ring regenerates the frame.
Q89. Repeater works on __________ layer.
Q90. The amplitude of a digital signal depends upon the________ to represent a bit.
Q91. Modulation of an analog signal can be accomplished through changing the ___________ of the carrier signal.
Q92. The RG number gives us information about ________.
Q93. Which error detection method involves polynomials?
Q94. If the ASCII character G is sent and the character D is received, what type of error is this?
Q95. Which error detection method can detect a single-bit error?
Q96. Which of the following sub layer, resolves the contention for the shared media
Q97. Which of the following ___________ uses a series of filters to decompose multiplexed signal into its constituent signals?
Q98. In Fast Ethernet, data rate can be increased by _______________ collisions.
Q99. Layers 5, 6 and 7 also called as network support layers.
Q100. Time domain plot show changes in signal phase with respect to time.
Q101. Analog to digital conversion is also termed as modulating an analog signal.
Q102. DC component is also termed as Direct current component or a component with non-zero frequency.
Q103. PCM is the first process of PAM.
Q104. In 4PSK each phase change represents ______bits.
Q105. In RS 422 Balanced mode two lines carry ________ signals which are not identical to each other.
Q106. A ______________ converts an analog signal into a digital signal.
Q107. When a beam of light travels through media of two different densities, if the angle of incidence is greater than the critical angle, ____________occurs.
Q108. When we talk about unguided media, usually we are referring to _________.
Q109. Radio wave transmission utilizes ___________ different types of propagation.
Q110. Asynchronous TDM is efficient only when the size of the time slot is kept relatively _______________
Q111. Data from a computer are _______; the local loop handles _______ signals.
Q112. Which error detection method uses ones complement arithmetic?
Q113. Addressing is not needed in _______________ configuration.
Q114. BLAST stands for :
Q115. The HDLC ___________ field defines the beginning and end of a frame.
Q116. _________ is the access protocol used by traditional Ethernet.
Q117. Bridges can divide a large ________ into smaller segments
Q118. Like VRC, LRC and CRC, Checksum is also based on _______________.
Q119. The information to be communicated in a data communications system is the
Q120. A set of devices connected by communication links is called networking
Showing the first 120 of 210 MCQs.