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Computer Networks
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Course Name
BSc IT (Bachelor of Science in Information Technology)
Subject Code BT0072 (Computer Networks )
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PART - A
PART - B
PART - C
Subject : Computer Networks
BT0072 : PART - C
Q. 1 | Identify the functionalities of the various layers in the OSI reference model Set A 1. Data Link Layer 2. Network Layer 3. Transport Layer 4. Application layer Set B a. Error handling during transmission b. Retransmitti |
| A) | 1- b, 2 - d, 3 - a, 4 - c |
| B) | 1- b, 2 - a, 3 - c, 4 - d | | C) | 1- a, 2 - d, 3 - b, 4 - c | | D) | 1- b, 2 - c, 3 - a, 4 - d | | | | Q. 2 | A Satellite at a distance 4000 km from a point on the earth's surface radiates a power of 2 Watts, from the antenna with a gain of 1.7dB in the direction of the observer. The receiving antenna has a gain of 52.3dB. What is the received |
| A) | 1.85 x 10-12 Watts |
| B) | 1.4789 x 10-13 Watts | | C) | 1.1304 x 10-13 Watts | | D) | 1.732 x 10-12 Watts | | | | Q. 3 | An analog signal is given by the expression s(t) = 3 cos 100 4t + 5 cos 300 4t - sin 400 4t What is the Nyquist rate for the signal? |
| A) | 800 |
| B) | 400 | | C) | 100 | | D) | 250 | | | | Q. 4 | Advantage of geo-stationary satellite are a) Regions of earth of any latitude can be covered b) Just 3 satellites are enough to cover the entire globe c) Satellite appears stationary relative to earth, therefore tracking of antenn |
| A) | a), b), c), d) |
| B) | c, d), e) | | C) | a), d), e) | | D) | b), c), d), e) | | | | Q. 5 | How many bits are required to achieve a signal to quantization noise ratio of at least 40 dB? |
| A) | 5 |
| B) | 6 | | C) | 7 | | D) | 8 | | | |
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