Sunday 27 September 2015

bca3040 smu bca summer 2015 IIIrd sem assignment

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PROGRAM
BCA
SEMESTER - 3
SUBJECT CODE & NAME
BCA 3040 – DATA COMMUNICATION
BK ID - B1644
CREDITS - 4
MAXIMUM MARKS – 60

Q1. Draw the block diagram of communication system and briefly explain about each block. 10
Answer: Block Diagram of Communication System: This section explains to you the functions of various blocks of communication system block diagram. The basic or the general block diagram of a communication system is as shown in


Q2. Briefly explain the communication channel with an example. 10
Answer: Communication channel: Communication channel means a medium through which electrical signals can be transmitted. A communication channel (or simply channel), refers either to a physical transmission medium such as a wire, or to a logical connection over a multiplexed medium such as a radio channel. A channel is used to convey an information signal, for example a digital bit stream, from one or several


Q3. What is modulation? Explain why modulation is required? 10
Answer: Modulation: Modulation is the process of varying one of characteristics (either amplitude or frequency or phase) of a high-frequency periodic waveform, called the carrier signal, with a modulating signal which typically contains information to be transmitted. If we look at a general function for a



Q4. What is Coaxial cable? Briefly explain the structure of Coaxial cable with a supported diagram. 10
Answer: Coaxial cable: Coaxial cable has traditionally been an important part of the long distance telephone network. Using frequency-division multiplexing (FDM), a coaxial cable can carry over 10,000 voice channels simultaneously. Coaxial Cable consists of 2 conductors. The inner conductor is held inside an insulator with the other conductor woven around it providing a shield. An insulating protective coating called a jack



Q5. Briefly explain Nyquist theorem with mathematical representation. 10

Answer: Nyquist theorem: The Nyquist theorem states that “a signal must be sampled at least twice as fast as the bandwidth of the signal to accurately reconstruct the waveform In other words, the sampling frequency should be at least twice the highest frequency contained in the signal. It is mathematically


Q6. What are the advantages of packet switching over circuit switching? 10
Answer: Packet-Switching: In packet switching message is divided into blocks of data called packets. Each packet is associated with a header before they are transmitted individually through the network. The path taken by each packet to reach their respective destination is depending on the status of links used by switching equipment. The packet-switching network is a distributed collection of packet-switching nodes. The long-haul circuit-switching telecommunications network was originally designed to handle voice traffic, and the majority of traffic on these networks continues to be voice. In circuitswitching networks,

Get fully solved assignment. Buy online from website
online store
or
plz drop a mail with your sub code
we will revert you within 2-3 hour or immediate
Charges rs 125/subject and rs 625/semester only.
if urgent then call us on 08791490301, 08273413412



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