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By analyzing the socket programming code with Wireshark, I learned how TCP ensures reliable communication between a client and a server. I observed the three-way handshake process that establishes the connection, the structured data exchange through TCP payloads, and the proper termination of the connection. This exercise enhanced my understanding of how messages are transmitted over the network, including concepts like packet headers, payload encapsulation, and port usage. It also provided practical insights into debugging network programs, identifying patterns in packet flows, and confirming that the client-server interaction operates as intended.
By analyzing the socket programming code with Wireshark, I learned how TCP ensures reliable communication between a client and a server. I observed the three-way handshake process that establishes the connection, the structured data exchange through TCP payloads, and the proper termination of the connection. This exercise enhanced my understanding of how messages are transmitted over the network, including concepts like packet headers, payload encapsulation, and port usage. It also provided practical insights into debugging network programs, identifying patterns in packet flows, and confirming that the client-server interaction operates as intended.
introduction
introduction
Wireshark is a powerful network protocol analyzer that is widely used for capturing and analyzing network traffic 📡. It allows users to capture live data from a network and inspect the details of each packet 📨, including headers, payloads, and the protocols being used. Wireshark is used to troubleshoot network issues 🔧, optimize performance ⚡, and ensure security 🔐. By analyzing network traffic, users can detect problems like bottlenecks, unauthorized access, or faulty connections 🚨. It supports a wide variety of protocols and helps users understand how data flows across the network in real-time 🌍. Whether you are debugging network issues or studying protocol behavior, Wireshark provides a detailed view of network interactions! 🚀
TCP Client and server in python
TCP Client and server in python
This Python program demonstrates a basic implementation of TCP communication using a client and a server. The client connects to the server on a specified IP address (127.0.0.1) and port (6789) using the socket module. Once connected, the client takes a string input from the user, sends it to the server, and waits for the server's response. The server processes this string by converting it to uppercase and sends the result back to the client. The client then displays the server's response.
On the server side, the code begins by setting up a socket that binds to the IP and port and listens for incoming connections. When a client connects, the server accepts the connection, receives the string data, processes it (converting it to uppercase), and sends the modified string back to the client. Once the response is sent, the connection is closed, and the server continues listening for additional clients.
This program effectively demonstrates the fundamentals of TCP communication, where data is reliably transmitted between a client and server. By running the server and client on the same machine (localhost), you can observe how the server processes client requests and returns results. This simple interaction highlights essential concepts such as establishing a connection, sending and receiving data, and properly handling connections in a network application.
UDP Client and server in python
UDP Client and server in python
This Python program implements a basic UDP client-server interaction. The server listens on a specified IP address (127.0.0.1) and port (4455) using a UDP socket. The client can send messages to the server, and the server processes these messages by converting them to uppercase before sending them back to the client. The communication continues until the client sends the special message !EXIT, signaling the server to terminate the connection.
On the server side, the code initializes a UDP socket and binds it to the specified host and port. It enters an infinite loop, waiting to receive data from a client. Upon receiving data, the server decodes it, processes it (converting it to uppercase), and sends the processed data back to the client's address. If the received message is !EXIT, the server terminates the loop and closes the socket.
This example highlights the differences between TCP and UDP communication. Unlike TCP, UDP is connectionless, meaning no handshake is required before data transmission. This makes it faster but less reliable. Despite these differences, the program demonstrates how a simple UDP server can process and respond to client requests effectively, showcasing the core concepts of connectionless communication.
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