Computer Networks Laboratory

Course Code: 20CS58L

Part-A: Programming Assignments

1. System Information

Implement the following using C++/Java/Python:

• A. Use an appropriate tool to find Host name, IP address, physical address, subnet mask, default gateway etc [hint: Ipconfig]. Explore different options available with the tool.
• B. On the host system, identify the TCP connections, ports on which the computer is listening, Ethernet statistics, the IP routing table, IPV4statistics, and IPV4 statistics etc. using the appropriate tool [hint: netstat]. Explore different options available with the tool.

2. Frame Sorting

Write a program to sort frames using appropriate sorting techniques.

3. Error Detecting Code

Write a program for error detecting code using CRC-CCITT (16- bits).

4. Shortest Path

Write a program to find the shortest path between vertices using the Bellman-Ford algorithm.

5. Client-Server Program

Using TCP/IP sockets, write a client–server program to make the client send the file name and to make the server send back the contents of the requested file if present.

6. Datagram Socket

Write a program on datagram socket for client/server to display the messages on the client side, typed at the server side.

7. RSA Algorithm

Write a program for a simple RSA algorithm to encrypt and decrypt the data.

8. Congestion Control

Write a program for congestion control using the leaky bucket algorithm and token bucket algorithm.

9. Random Early Detection (RED)

Write a program to implement random early detection (RED) congestion control algorithm.

Part-B: Simulation Experiments

10. Point-to-Point Network

a. Implement three nodes point-to-point network with duplex links between them. Set the queue size, vary the bandwidth and find the number of packets dropped.

b. Implement transmission of ping messages/trace route over a network topology consisting of 6 nodes and find the number of packets dropped due to congestion.

11. Ethernet LAN

a. Implement an Ethernet LAN using n nodes and set multiple traffic nodes and plot congestion window for different source/destination.

b. Implement simple ESS and with transmitting nodes in a wireless LAN by simulation and determine the performance with respect to the transmission of packets.

12. GSM and CDMA

a. Implement and study the performance of GSM on NS2/NS3 (Using MAC layer) or equivalent environment.

b. Implement and study the performance of CDMA on NS2/NS3 (Using stack called Call net) or equivalent environment.