V SEMESTER B.C.A. EXAMINATION NOV/DEC 2009 NEW SCHEME
COMPUTER SCIENCE
5 BCA 3 : COMPUTER NETWORKS - 1
Time : 3Hours Max.Marsk: 80
Instruction : Answer all sections
SECTION-A
Answer any eight questions.Each question carries 3 marks. 8 X 3= 24
1.What is peer ? Give an example
2.What is attenuation.
3.Explain rate based flow control.
4.Compare pure ALOHA with slotted ALOHA.
5.what is feed back loop in congestion control ?
6.How do you restrict packet lifetime ?
7.What is the function of session layer in OSI model ?
8.What is Substitution Cipher ? Give an example for Caesar Cipher.
9.What are the Features of LAN ?
10.Does a protocol exist that allows the blue army to win in 3 way hand shake .Give
reasons for your answers.
SECTION -B
Answer any four full questions. Each full question carry 14 marks
11.a) Sketch Mancheste and differential Manchester ecoding for the following bit stream.
Assume line is initially in the low state for different Manchester 0001110101
b) What is the remainder obtained by dividing x^7 + x^5+1 by the generator polynomial
x^3 + 1 .Generate the frame to be transmitted. 7 + 7
12.a) Provide IEEE standards for satellite network
b) Briefly explain the services provided by data link layer. 7 + 7
13.a)what is the advantage of a hierarchical routing table ? Justify with an example.
b) Explain congestion control algorithm 7 + 7
14.a)Justify existence of a Transport layer in OSI model .though the services offered by its
are similar to the Network layer .
b) Discuss session layer in public Networks. 7 + 7
15.a) Do a comparative study of datagram and virtual circuit subnets.
b) Mention the protocols used in application layer and explain its functions and usage. 7 + 7
16.Write short notes on :
a) ARPANET
B) E - mail
c) ISDN 5 + 5 + 4
COMPUTER SCIENCE
5 BCA 3 : COMPUTER NETWORKS - 1
Time : 3Hours Max.Marsk: 80
Instruction : Answer all sections
SECTION-A
Answer any eight questions.Each question carries 3 marks. 8 X 3= 24
1.What is peer ? Give an example
2.What is attenuation.
3.Explain rate based flow control.
4.Compare pure ALOHA with slotted ALOHA.
5.what is feed back loop in congestion control ?
6.How do you restrict packet lifetime ?
7.What is the function of session layer in OSI model ?
8.What is Substitution Cipher ? Give an example for Caesar Cipher.
9.What are the Features of LAN ?
10.Does a protocol exist that allows the blue army to win in 3 way hand shake .Give
reasons for your answers.
SECTION -B
Answer any four full questions. Each full question carry 14 marks
11.a) Sketch Mancheste and differential Manchester ecoding for the following bit stream.
Assume line is initially in the low state for different Manchester 0001110101
b) What is the remainder obtained by dividing x^7 + x^5+1 by the generator polynomial
x^3 + 1 .Generate the frame to be transmitted. 7 + 7
12.a) Provide IEEE standards for satellite network
b) Briefly explain the services provided by data link layer. 7 + 7
13.a)what is the advantage of a hierarchical routing table ? Justify with an example.
b) Explain congestion control algorithm 7 + 7
14.a)Justify existence of a Transport layer in OSI model .though the services offered by its
are similar to the Network layer .
b) Discuss session layer in public Networks. 7 + 7
15.a) Do a comparative study of datagram and virtual circuit subnets.
b) Mention the protocols used in application layer and explain its functions and usage. 7 + 7
16.Write short notes on :
a) ARPANET
B) E - mail
c) ISDN 5 + 5 + 4
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