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(Please write your Roll No. immediately) |
Roll No. .................................. |
Sixth Semester [B.Tech] - April 2006
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Paper Code : ETEC – 308 Subject : Data Communication Networks |
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Time : 11/2 Hours |
Maximum Marks : 30 |
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Note : Attempt any 3 questions in all. Q1 is compulsory. Each question carries 10 marks. |
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Q1 |
( a ) |
Can a device has more than one IP address? |
1 |
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( b ) |
Why is IP called best effort delivery? | 1 | |
| ( c ) | What is MTU and how fragment is related to it? | 1 | |
| ( d ) | What is "Silly window syndrome"? | 1 | |
| ( e ) | Why would an application use UDP instead of TCP? | 1 | |
| ( f ) | What is the maximum size of TCP header? | 1 | |
| ( g ) | Find the mask that creates 2 subnets in class B? | 1 | |
| ( h ) | How many bits are there in IPv4 and IPv6 addresses? | 1 | |
| ( i ) | Name any four protocols of the Application layer? | 1 | |
| ( j ) | Encrypt the message "WONDERFUL" using monosyllabic substitution with key=4. | 1 |
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Q2 |
( a ) |
Differentiate between congestion and Quality of Service? |
5 |
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( b ) |
Explain Distance vector routing algorithm. How count to infinity problem is related with this algorithm> |
5 |
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Q3 |
( a ) |
Differentiate between sequence number and acknowledgement number used at the Transport layer. |
5 |
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( b ) |
Define sub-netting and Super-netting. Find the number of subnets and
hosts/subnet for the following blocks:
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5 |
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Q4 |
( a ) |
Explain DES? How triple DES is different from the original DES? |
5 |
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( b ) |
Write short notes on: 1) Token Ring 2) DQDB |