Guru Gobind Singh Indraprastha Vishwavidyalaya 2009-5th Sem B.C.A Computer Application Computer Networking, ester, End Term -, , - Question Paper
End Term Examination
(Please write your Exam Holt No.)
Exam Roll
I'll- I II SKMt STKW lC A| OF.t l
Paper Code: BCA301 Paper Id-20301 Time. 3 Hours
Subject: Computer Networking Maximum Marks :75
Noto: Attempt five questions selecting one question from each unit. Q.1 is compulsory.__J
Ql (a) Explain five components of data communication system (b) What is a datagram subnet? iof Why mobile phones are named as cellphones? pi) Is Internet a WAN? Comment.
What are the three criteria necessary for an effective and efficient network?
(() What is a null modem?
Define checksum.
(h) What is a brouter?
(il/ In a two-wire telephone line, why dors full duplex transmission have half the bit rate of half duplex transmission?
(10x2.5=25)
(j) Define virtual terminal.
UNIT-1
Q2 (a) Explain the functions of 7-layers of OS1 model in detail. (9)
(b) What is the difference between service point address a logical address and a physical address? 13.5)
Q3 <l What is wireless communication? How it is different from guided media?
Explain different guided media and unguided media into which they are divided broadly. Explain the advantages of optical fiber over coaxial cable. (9)
(b) What is seriaJ transmission? Briefly discuss DTE-DCE interfere. 13.5)
UNIT-11
(a) What is inverse multiplexing? Explain three major techniques of multiplexing with suitable diagrams. [9\
(b) What are two main methods of line discipline? How does a system select which one to use? (3.5)
(a)/Explain sliding window protocol for flow control at data link layer with surfable example. (9)
"'Differentiate between circuit switching packet switching and message switching. (3.5)
(/Define routing. Describe link state routing algorithm. (9)
(fc Explain role of network layer in internet briefly. Which device works at network layer? (3.5)
(a) What is congestion control? Explain one technique for controlling the congestion. (9)
(b) What is a bridge? Discuss different types of bridge. (3.5)
tjWIT-IV
(a) Discuss functions of transport, session, presentation and application layers.(9) v
(b) What are the two categories of data compression methods? What is the difference between the categories? (3.5)
(9)
connection
(3.5)
Q4
Q5
06
Q7
(a) Explain the format of segment in TCP.
(b) Briefly explain three way handshaking establishment ut transport layer.
methods for
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