socket.recv(bufsize): This method receives a TCP message from the socket. The bufsize argument defines the maximum data it can receive at any one time.

socket.recvfrom(bufsize): This method receives data from the socket. The method returns a pair of values: the first value gives the received data, and the second value gives the address of the socket sending the data.

socket.recv_into(buffer): This method receives data less than or equal to buffer. The buffer parameter is created by the bytearray() method. We will discuss it in an example later.

socket.recvfrom_into(buffer): This method obtains data from the socket and writes it into the buffer. The return value is a pair (nbytes, address), where nbytes is the number of bytes received, and the address is the address of the socket sending the data.

socket.send(bytes): This method is used to send data to the socket. Before sending the data, ensure that the socket is connected to a remote machine. It returns the number of bytes sent.

socket.sendto(data, address): This method is used to send data to the socket. Generally, we use this method in UDP. UDP is a connectionless protocol; therefore, the socket should not be connected to a remote machine, and the address argument specifies the address of the remote machine. The return value gives the number of bytes sent.

socket.sendall(data): As the name implies, this method sends all data to the socket. Before sending the data, ensure that the socket is connected to a remote machine. This method ceaselessly transfers data until an error is seen. If an error is seen, an exception would rise, and socket.close() would close the socket.