Computer-Networks

The repository contains lab work done as a part of Computer Networks course at BITS Pilani

Concepts in Labsheets

• Lab1

  • Introduces Wireshark and DNS

• Lab2

  • Understanding the functioning of File Transfer Protocol (FTP) using Wireshark.
  • Understanding the functioning of Domain Name System DNS Protocol using Wireshark and nslookup command.
  • Introduction to Traceroute Program.

• Lab3

  • To learn the concept of socket to create network application
  • To learn Socket creation using LINUX system calls
  • Writing a simple TCP client and TCP server program to achieve communication between two processes running on same machine and on two different machines
  • Programs included -
    • Server which sends the next integer given a real input from client
    • Simple TCP client server where client sends a message and server sends a reply
    • TCP server handling upto three clients

• Lab4

  • Client-server program writing using UDP sockets
  • File Transfer Program (with partial file sending option) using TCP sockets
  • Creating concurrent server (handling multiple clients) using fork() system call
  • Programs included -
    • Concurrent TCP server
    • A UDP echo server
    • a server with a guess game, client is asked to pick a number between 1 to 10, and if that is the number picked by server too, client wins, else looses.
    • FTP servers following TCP and UDP protocols supporting partial file sending, given an offset.

• Lab5

  • To learn the concept of reliable protocol designand implementation
  • To learn Stop and Wait reliable protocol design and implementation using UDP sockets
  • Programs included -
    • Stop and wait protocol without any packet loss
    • Stop and wait protocol with packet loss

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