Data Communication and Networks.pdf - Google Drive
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Data Communication and Networks.pdf - Google Drive
(b) State Nagle's algorithm and explain how 1 0. does it reduce the wastage of bandwidth ? (c) What is meant by error de
CS-09 I
No. of Printed Pages : 2
ADCA / MCA (II Yr) .0 Term-End Examination ■O December, 2011 O O CS-09 : DATA COMMUNICATION AND NETWORKS Time : 3 hours Note :
Maximum Marks : 75
Question number 1 is compulsory. Answer any three questions from the rest.
1. (a) What happens in a token bus network if a 10 station accepts the token and then crashes immediately ? How does protocol handle this situation ? (b) State Nagle's algorithm and explain how 1 0 does it reduce the wastage of bandwidth ? (c) What is meant by error detection and 1 0 correction code ? Explain the operation of CRC on following data. Message : 1100101011001010 Generator : 101 2. (a) Explain Bellman - ford shortest path 1 0 algorithm with the help of an example. (b) Differentiate between Baseband signal and 5 Broadband signal.
CS-09
1
P.T.O.
3. (a) Explain the operation of Internet congestion 9 algorithm through appropriate diagram. Also, explain the purpose of the following parameters : Congestion window Slow start Threshold (b) Explain any two reasons for having a 6 minimum frame length in CSMA/CD. 4. (a) Explain the purpose of the following fields
10
in CSMA MAC frame formation : (i)
Preamble
(ii)
Start frame delimeter
(iii)
Source address
(iv)
Length
(v)
Pad
(b) What is DNS ? How does it map in IP 5 address ? 5. (a) Obtain expression for throughput in
10
ALOHA and slotted ALOHA protocols. (b) What is the applic&ion of Network Address 5 Translation Box ? Also, explain its operation.
