18ECL76 Computer Networks Lab syllabus for EC

Laboratory Experiments

PART-A: Simulation experiments using NS2/ NS3/ OPNET/ NCTUNS/ NetSim/QuaiNet or any other equivalent tool

1. Implement a point to point network with four nodes and duplex links between them. Analyze the network performance by setting the queue size and varying the bandwidth.

2. Implement a four node point to point network with links n0-n2, nl-n2 and n2-n3. Apply TCP agent between n0-n3 and UDP between nl-n3. Apply relevant applications over TCP and UDP agents changing the parameter and determine the number of packets sent by TCP/UDP.

3. Implement Ethernet LAN using n (6-10) nodes. Compare the throughput by changing the error rate and data rate.

4. Implement Ethernet LAN using n nodes and assign multiple traffic to the nodes and obtain congestion window for different sources/ destinations.

5. Implement ESS with transmission nodes in Wireless LAN and obtain the performance parameters.

6. Implementation of Link staterouting algorithm.

PART-B: Implement the following in C/C++

1. Write a program for a HLDC frame toperform the following.

i) Bit stuffing

iil) Character stuffing.

2 Write a program for distance vector algorithm to find suitable path for transmission.

3. Implement Dijkstra 's algorithm to compute the shortest routing path.

4. For the given data, use CRC-CCITT polynomial to obtain CRC code. Verify the program for the cases

a Without error

b. With error

5. Implementation of Stop and Wait Protocol and Sliding Window Protocol

6. Write a program for congestion control using leaky bucket algorithm.

Course outcomes:

On the completion of this laboratory course, the students will be able to:

1. Choose suitable tools to model a network.

2 Use the network simulator for learning and practice of networking algorithms.

3. Illustrate the operations of network protocols and algorithms using Cprogramming.

4. Simulate the network with different configurations to measure the performance parameters.

5. Implement the data link and routing protocols using C programming.

Conduct of Practical Examination:

• All laboratory experiments are tobe included for practical examination.
• For examination one question from software and one question from hardware or only one hardware experiments based on the complexity to be set.
• Students are allowed to pick one experiment from the lot.
• Strictly follow the instructions as printed on the cover page of answer script for breakup of marks.
• Change of experiment is allowed only once and Marks allotted to the procedure part to be made zero.