7/29/2019 DCN Question
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Q52. What is refraction and reflection?Q53. How do guided media
differ from unguided media?Q54. What are the major three classes of
guided media?Q55. Name the two major categories of transmission
media?Q56. Name the advantages of optical fibre over twisted pair
and coaxial cable.Q57. What is the difference between
omni-directional waves and unidirectional waves?Q58. What is an
IrDA?Q59. What do you understand by intrusion detection?
Q60. Explain connectionless and connection oriented
communication.Q61. Define (a) Refractive index (b) Gateway (c)
Ethernet (d) Mesh topologyQ62. Explain the factors that
differentiate between any two fibre optics.Q63. Explain the
characteristic of BRI and PRI separately with their importance.Q64.
In what manner , a bridge operates in data communication?Q65. What
do you mean by MAC layer( Media access control)?
Q66. What is a MAC Address?Q66(a). What is the difference
between physical address and logical address?Q67. Explain time
division multiplexing(TDM).Q68. Explain frequency division
multiplexing(FDM).Q69. What are the advantages of time division
multiplexing(TDM) over frequency division multiplexing(FDM)?Q70. A
system is designed to sample analog signals, convert them to
digital form with a 3-bit converter, and
transmit them. What bit rate is required if the analog signal
contains frequencies between 300Hz to3400Hz.
Q71. What is the advantage and disadvantage of twisted pair
wires.Q72. What is the difference between an amplifier and a
repeater? How is hub related to repeater?Q73. What is firewall and
explain the characteristics of a good firewall system.Q74. What is
the difference between Bit Rate and Baud?Q75. What is Virtual
Private Network (VPN)?Q76. What are the different types of computer
attacks?Q77. What is multiplexing?Q78. Explain IP4 and IP6.Q79.
What is the difference between IP4 and IP6?Q80. Explain datagram of
IPv4.Q81. Explain the internet protocol version 4 address
classes.
Q82. What do you mean by datagram?
Q83. What do you mean by ISDN?
Q84. What are the differences between circuit switching and
packet switching?
