🌐 Computer Networks Lab Programs

📚 Overview

This repository contains a collection of Computer Networks laboratory programs implemented in C.

The programs demonstrate important networking concepts including:

• Client-Server Communication
• Error Detection using CRC
• Routing Algorithms
• Flow Control Protocols
• Sliding Window Techniques
• Network Layer Algorithms

These programs are designed for Computer Science and Information Technology students to understand networking concepts through practical implementation.

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🚀 Programs Included

1. Client-Server Communication

Unidirectional Communication

• One-way communication
• Client sends message to server
• Implemented using TCP sockets

Bidirectional Communication

• Two-way communication
• Client and server exchange messages
• Interactive communication model

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2. Cyclic Redundancy Check (CRC)

CRC Without Noise

• CRC generation
• Error detection at receiver side
• Binary division using XOR

CRC With Noise

• Simulates transmission errors
• Random bit corruption
• Error detection demonstration

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3. Routing Algorithms

Dijkstra Algorithm

• Shortest path calculation
• Link State Routing
• Network Layer routing

Distance Vector Routing

• Bellman-Ford based routing
• Routing table generation
• Next-hop calculation

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4. Flow Control Protocols

Stop and Wait Protocol

• Frame transmission
• ACK handling
• Timeout and retransmission

Go-Back-N Protocol

• Sliding window mechanism
• Multiple frame transmission
• Retransmission from lost frame

Selective Repeat Protocol

• Independent frame acknowledgment
• Selective retransmission
• Efficient error recovery

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🛠 Technologies Used

• C Programming
• TCP/IP Networking
• Winsock API