Here is a sample code in Python for a simple client-server communication program:

Server Side:

import socket

set the host and port number

HOST = '127.0.0.1' PORT = 9000

create a socket object

server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

bind the socket object to a specific host and port number

server_socket.bind((HOST, PORT))

listen for incoming connections

server_socket.listen(1)

accept the client connection

client_socket, address = server_socket.accept()

receive data from client and send response back

while True: data = client_socket.recv(1024).decode() if not data: break elif data == 'Exit': client_socket.sendall('Goodbye!'.encode()) break else: client_socket.sendall(('Received: ' + data).encode())

close the socket connection

client_socket.close() server_socket.close()

Client Side:

import socket

set the host and port number

HOST = '127.0.0.1' PORT = 9000

create a socket object

client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

connect to the server

client_socket.connect((HOST, PORT))

send message to the server

message = input('Enter message: ') client_socket.sendall(message.encode())

receive response from the server

response = client_socket.recv(1024).decode() print(response)

close the socket connection

client_socket.close()

Note: This is just a basic example and does not include error handling for all possible scenarios. It is important to implement proper error handling and exception catching in a real-world application