With each visit of this Data Communication and Networking online Quiz / Practice Test, the list of MCQs / Objective Questions presented will be different, offering you a diverse set of practice opportunities. This variability encourages you to practice extensively, refining the accuracy of your answers and your overall grasp of the content. By utilizing this resource, you can hone your skills and become more adept at managing time constraints during actual exams.
Test Instructions Question type Randomized MCQs.Changes every time you visit the test Total Number of Questions 30 Time Limit 20 Minutes Points 1 Point for each Question
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Question 1 of 30
Q-1.A DS-0 service is a single digital channel of _______
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Question 2 of 30
Q-2.Mobile telephones use frequencies in the _______ range.
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Question 3 of 30
Q-3.Blocking is not a problem in a _______ switch.
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Question 4 of 30
Q-4.In a cell network, cells belonging to a single message _______.
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Question 5 of 30
Q-5.Asynchronous protocols are widely used in _______
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Question 6 of 30
Q-6.The modulation technique most affected by noise is _______
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Question 7 of 30
Q-7.In the PSTN hierarchy, the class three switching centers are known as the _______ offices
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Question 8 of 30
Q-8.A message from device A consists of packet X and packet Y. In the virtual circuit approach to packet switching, packet Y's path _______ packet X's.
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Question 9 of 30
Q-9.Acceptance of a call requires a _______ message in an LAPD frame.
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Question 10 of 30
Q-10.In _______ process, layer n on the sending machine communicates with layer n on the receiving machine.
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Question 11 of 30
Q-11.In its most popular implementation, the EIA-232 interface standard defines _______ wires for actual data transmission
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Question 12 of 30
Q-12.The HDLC U-frame has a _______ bit code field
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Question 13 of 30
Q-13.For refraction to occur, the _______ must be of a lower density than the _______
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Question 14 of 30
Q-14.In PM the _______ of the information signal modulates the phase of the carrier signal
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Question 15 of 30
Q-15._______ determines which device can send
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Question 16 of 30
Q-16.The value of a simple sine wave at time zero is zero. The next value is negative. The phase shift is therefore _______ degrees.
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Question 17 of 30
Q-17.Checksum is an error detection method used primarily by the _______
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Question 18 of 30
Q-18.When message data is mistaken for control data, this is called a lack of _______.
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Question 19 of 30
Q-19.A _______ line configuration is one in which three or more devices share a single link
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Question 20 of 30
Q-20.An ISDN address uses _______ decimal digits to define a subscriber.
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Question 21 of 30
Q-21.The receive equalizer reduces delay distortions using ________
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Question 22 of 30
Q-22._______ is an example of a full-duplex system
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Question 23 of 30
Q-23.When a DTE wants to acknowledge the receipt of a frame from the local DCE, it uses ______________
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Question 24 of 30
Q-24.Traffic on a DQDB bus _______.
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Question 25 of 30
Q-25.For _______, the minimum bandwidth required for transmission is equal to the baud rate
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Question 26 of 30
Q-26.Which one of the following is a data link protocol?
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Question 27 of 30
Q-27.An SVC is a transmission path in _______ switching.
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Question 28 of 30
Q-28.A geosynchronous orbit is 22,000 miles from earth at the _______.
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Question 29 of 30
Q-29.The field in the IP packet header that defines the number of hops a packet can travel before being dropped is called ___________.
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Question 30 of 30
Q-30.A simple sine wave is offset one half cycle at time zero. This is a phase shift of _______ degrees
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