UCS1511: Computer Networks - Lab Work

Programs, reports, documentation, and output screenshots implemented and designed for the laboratory coursework in UCS1511: Computer Networks.

Link to Documentation of All Experiments

Experiments

All experiment reports can be found here.

Networking Functions using System Calls in C

1. Theoretical Study

   • Study the basic network commands in GNU systems.
   • Study the common system calls in the C language.
   • Network Commands in *nix
   • System Calls in C
   
   

2. TCP Echo Server and Chat Server

   • Implement an Echo Server using C and the TCP protocol
   • Implement a File Server using C and the TCP protocol
   • Implementations and Reports
     • A: Echo server
     • B: File server
   
   

3. UDP Chat Server - Single and Multi client

   • Implement a single-client chat server using C and the UDP protocol
   • Implement a multi-client chat server using C and the UDP protocol
   • Implementations and Reports
     • A: Single-Client
     • B: Multi-Client
   
   

4. ARP Simulation

• Simulate the working of ARP using socket programming in the C language.
• Use a TCP-based multi-client server to exchange messages.
• Sample Output
• Report

5. DNS Simulation

• Simulate the working of Domain Name Server using socket programming in the C language.
• Use a UDP-based multi-client server to exchange messages.
• Sample Output
• Report

6. Hamming Code for Error Correction

• Implement Hamming Code for Single Error Correction using C socket program.
• Use a TCP-based transmission server to exchange messages.
• Sample Output
• Report

7. HTTP Web Client

• Implement a HTTP web client program using C socket program.
• Construct a TCP client to connect with the web server and download a file.
• Sample Output
• Report

Network Simulations and Analyses using NS2 and NAM

8. Simple Network Simulation using NS2 and NAM

• Study the Network Simulator (NS2) using a simple tcl-script generated network schedule comprising of FTP traffic using TCP packets.
• Additionally, construct a constant bitrate UDP packet traffic directed to the same node
• Sample Output
• Report

9. Congestion Control

• Analyze the difference between the congestion control mechanism offered by Tahoe and Reno TCP agents using NS2.
• Use a network schedule comprising of FTP traffic using TCP packets for the analysis.
• Sample Output
• Report

10. Routing Protocols

• Analyze the difference between the the distance-vector and link-state routing protocols when executing two UDP connections in a network using NS2.
• Use a network schedule comprising of FTP traffic using UDP datagrams for the analysis.
• Sample Output
• Report

11. Comparison and TCP and UDP Protocols

• Analyze the difference between a TCP and UDP connection sharing a bottle-neck link using NS2.
• Use a network schedule comprising of FTP and CBR traffic for the TCP and UDP networks, respectively.
• Sample Output
• Report