Q. Match the following with respect to the Mobile Computing Architecture.

a. Downlink control                                      1. 100 Mbps
b. Radio communication data rate              2. Residency latency (RL)
c. The average duration
of user’s stay in cell                                     3. Sending data from a BS to MD
d. FDDI bandwidth                                       4. 2-Mbps

Codes : a b c d

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Q. When data and acknowledgement are sent in the same frame, this is called as

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Q. Encryption and Decryption is the responsibility of ___ Layer.

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Q. An analog signal carries 4 bits in each signal unit. If 1000 signal units are sent per second, then baud rate and bit rate of the signal are ________  and ____________

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Q. The VLF and LF bauds use propagation for communication

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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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