Computer Networks

• The Assignments/Projects given as a part of Computer Networks course in fifth semester curriculum of Undergraduate Course.
• This Repository contains simulation based projects of various logical link control layer protocols and actual implementation of some of the Application/Network Layer protocols as well.
• Each Assignment directory contains respective reports to know more about the particular one.

Brief Overview:

• Assignment 1: Error detection methods(CRC/VRC/LRC/Checksum) in Data Link Layer simulation.
  • How to simulate?
  • Start server.py then client.py side by side.
• Assignment 2: Flow Control Methods(Stop&Wait/GoBackN/SelectiveRepeat) in Data Link Layer simulation.
  • How to simulate?
  • Start channel.py then server.py then client.py side by side.
• Assignment 3: Different CSMA techniques(One/Non/p-persistent) simulation.
  • How to simulate?
  • Create a directory named logs and input, output directories inside it.
  • Run create_inputs.py to create some input files.
  • Create collide.txt with text 0 in logs directory, and log.txt, analysis.txt there itself.
  • Run main.py.

  • You can run the individual one-persistent, p-persistent and non-persistent files to simulate another type of implementation(a rather vague one).

• Assignment 4: CDMA technique with Walsh Code generation simulation.
  • How to simulate?
  • Create a directory named logs and input, output directories inside it.
  • Run create_inputs.py to create some input files.
  • Create log.txt, analysis.txt in logs directory.
  • Run main.py.
• Assignment 5: Analysis of packets using Wireshark.
  • How to simulate?
  • No simulation needed.
• Assignment 6: Simulation of basic networking using Cisco Packet Tracer.
  • How to simulate?
  • No simulation needed.
• Assignment 7: Implementation of BOOTP and DHCP.
  • How to simulate?
  • Both DHCP and BOOTP: Run main.py with help argument to get idea.
• Assignment 8: Implementation of FTP, DNS and Telnet.
  • How to simulate?
  • FTP: More info here.
  • DNS: Build with go build ., Run minidns binary, Test with dig example.com @localhost -p1053
  • Telnet: Start server.py then run client.py.