University of Delhi 2011-2nd Sem Post Graduate Diploma Computer Application Pgdca- -cs-2.4 computer network and internet - Question Paper
This question paper contains 4 printed pages.]
1759 Your Roll No.
This question paper contains 4 printed pages.]
PGDCA /II Sem. A
Paper - CS-2.4 COMPUTER NETWORK AND INTERNET
Time : 3 Hours Maximum Marks : 100
(Write your Roll No. on the top immediately on receipt of this question paper.)
Attempt all questions. Parts of a question should be .answered together.
1. (a) .A host computer is interconnected by a .large number of dumb terminals. . Is, it a computer network? Justify your answer. 2
(b) Why is the minimum packet size of Ethernet frame 64 bytes? 2
(c) Give two computer applications for which Connection-Orientation services are appropriate and for which Connectionless services are best. 2
(d) Name any device used in the following layers: 1x4
(i) Physical Layer.
(ii) Data Link Layer. '
(iii) Network Layer.
(iv) Transport Layer.
(e) What is a bridge? In which layer you find it ? Explain the mode of operation of bridges in transmitting frames between LANs. 1+1+3
(f) Diagrammatical!y explain TCP-header and discuss the various fields of header. 5
2. - (a) What do you understand by 10 Base 5 with respect to Ethernet? 2
(b) What is web browser & briefly explain its architecture. 2+3
(c) Give full forms of the following:-
(i) SMTP
(ii) FTP
(iii) HTTP
(iv) ARP 4
(d) How many types of web documents are 'there? Write their advantages and.disadvantages. 3+6
Name two basic transmission technologies used in networks. <'<, i ;J u t* : 1+2
3. (a) (b)
(c)
(d)
. 4. (a)
What problems are associated with SLIP
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protocol? 3
Explain. OSI reference model. Describe the function performed by each layer. ( 7
Define CSMA / CD protocol ? In which network is it used ? Which algorithm is used 'to'avoid
collisions in CSMA/ CD ? Explain. 2+1+4
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What is client-server paradigm? 2
(b) Describe connect procedure of Socket API. 3
(c) Draw the waveform of the bit stream 101100111001 using the following encoding schemes: 2x3
(i) Binary encoding
(ii) Manchester encoding
(iii) Differential Manchester encoding
1759
3
(i) Circuit switching and packet switching, . . ..(ii), Repeater and Router,
U' (iii) TCP and UDP.
5. Write short notes on the following:-
4x5
(i). TFTP .
(ii) MIME
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ft jifi Vi
(iv) RARP
(v) NFS ' " !
. f' r f i I; t >
j'.rnbf' jno ik"t 'jrit jw/.u f f)0;
*
-ff':;- . * -
4 200
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