WELCOME TO IP UNIVERSITY QUESTION PAPERS WEBSITE
Homepage : https://ippapers.tripod.com/ |
Back to VI semester papers
|
(Please write your Roll No. immediately) |
Roll No. .................................. |
Sixth Semester [B.Tech] - February 2006
|
Paper Code : ETEC – 308 Subject : Data Communication Networks |
|
Time : 11/2 Hours |
Maximum Marks : 30 |
|
Note : Attempt any 3 questions in all. Q1 is compulsory. Each question carries 10 marks. |
|
Q1 |
( a ) |
How flow control is different than error control? |
1 |
|
( b ) |
List the disadvantages of using piggybacking. | 1 | |
| ( c ) | List the factors that will determine the length of the sliding window. | 1 | |
| ( d ) | Name any three protocols of the data link layer. | 1 | |
| ( e ) | Find the binary equivalent of x4 + x3 + x | 1 | |
|
( f ) |
How bit rate and baud rate are correlated. | 1 | |
| ( g ) | Calculate the maximum possible bit rate for a noiseless channel with a bandwidth of 3500Hz, transmitting a signal with 8 signal levels. | 1 | |
| ( h ) | What is the advantage of using Trellis coded modulation? | 1 | |
| ( i ) | How DSL modem can support high speed digital communication over traditional telephone loops. | 1 | |
| ( j ) | Discuss the advantages of using packet switching over circuit switching. | 1 |
|
Q2 |
( a ) |
List the differences between the OSI and TCP/IP model. |
5 |
|
( b ) |
What are the advantages of PSK over ASK. Draw the constellation diagram if the data points are (2,0), (2,2), (-2,0) and (-2,-2). Is the modulation ASK, PSK or QAM. |
5 |
|
Q3 |
( a ) |
What are the different types of redundancy checks used in data communication? |
5 |
|
( b ) |
Define CSMA/CD protocol and its advantages over CSMA protocol. | 5 |
|
Q4 |
( a ) |
Discuss sliding window protocol? Discuss the criteria for choosing the sender and receiver sliding window size with suitable example. |
5 |
|
( b ) |
Name the types of HDLC frames. In HDLC, what is bit stuffing and why is it needed? | 5 |