___________________ are the array of switches which forms circuit switching fabrics.
A. Packet arrays
B. Optical cross connects
C. Circuit arrays
D. Optical networks
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Optical switching can be classified into ________ categories.
A. Two
B. Three
C. Four
D. One
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The system which has ______ signal to noise ratio can tolerate larger timing error.
A. Large
B. Small
C. Large & small
D. None of the mentioned
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Which reduces the effective distance between signals in signal space?
A. Time error
B. Frequency offset
C. Time error & frequency offset
D. None of the mentioned
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When a terminal is able to utilize the measurements made on the return link it is called as
A. Open loop method
B. Closed loop method
C. Quasi close loop method
D. None of the mentioned
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In open loop method, the time reference error __________ with respect to time.
A. Increases exponentially
B. Decreases exponentially
C. Increases quadratically
D. Decreases quadratically
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Which method needs precorrect time?
A. Open loop method
B. Closed loop method
C. Open & closed loop method
D. None of the mentioned
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Which method requires external authority and is inflexible?
A. Open loop method
B. Closed loop method
C. Open & closed loop method
D. None of the mentioned
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Which method has two way link?
A. Open loop method
B. Closed loop method
C. Open & closed loop method
D. None of the mentioned
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Which method has fast acquisition and can work without return link?
A. Open loop method
B. Closed loop method
C. Open & closed loop method
D. None of the mentioned
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Word of the Day
21 Aug
Inequitable
unfair; unjust.
غیر منصفانہ، غیر مساوی طور پر

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