Q. Using the RSA public key crypto system, if p = 13, q = 31 and d = 7, then the value of e is

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Q. Which of the following is widely used inside the telephone system for long-haul data traffic?

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Q. Find the false statement:

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Q. The message 11001001 is to be transmitted  using the CRC  polynomial  x3 +1 to protect it from errors. The message that should  be transmitted is :

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Q. What is the bit rate for transmitting uncompressed 800 x 600 pixel colour frames with 8 bits/pixel at 40 frames/second?

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Q. In IPV 4, the IP address 200.200.200.200 belongs to

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Q. Which layer of OSI reference model is responsible for decomposition of messages and generation of sequence numbers to 'ensure correct re-composition from end to end of the network?'

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Q. A client-server system uses a satellite network, With the satellite at a height of 40,000 kms. What is the best-case delay in response to a request (Note that the speed of light in air is 3,00,000 km/second).

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Q. The start and stop bits are used in serial communication for

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Q. ___________ is a type of transmission  impairment in which the SIgnal looses strength due to The resistance of the transmission medium.

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Q. Match the following :

                List - I                                List - II

a. Call control protocol         i. Interface between Base Transceiver Station (BTS) and Base Station Controller (BSC)

b. A-bis                                  ii. Spread spectrum

c. BSMAP                                iii. Connection management

d. CDMA                                 iv. Works between Mobile Switching Centre (MSC) and Base Station Subsystem (BSS)

Code:
a  b  c  d

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Q. An analog signal has a bit rate of 6000 bps and a baud rate of 2000 baud. How many data elements are carried by each signal element?

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Q. In a classful addressing, first four bits in Class A IP address is

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Q. Consider the following S1 and S2 :

S1 : A hard handover is one in which the channel in the source cell is retained and used for a while in parallel with the channel in the target cell.

S2 : A soft handover is one in which the channel in the source cell is retained and only then the channel in the target cell is engaged.

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Q. How many distinct stages are there in DES algorithm, which is parameterized by a 56-bit key?

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Q. Which of the following algorithms is not a broadcast routing algorithm?

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Q. The period of a signal is 10 ms. What is its frequency in Hertz?

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Q. For n devices in a network, ____ , number of duplex-mode links are required, for a mesh topology.

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Q. How many characters per second (7 bits + 1 parity) can be transmitted over a 3200 bps line if the transfer is asynchronous? (Assuming 1 start bit and 1 stop bit)

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Q. Which of the following is not a field in TCP header ?

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