-Replicate and Enhance this echo client/Server program

from socket import *

serverName = servername

serverPort = 12000

clientSocket = socket(AF_INET, SOCK_STREAM)

clientSocket.connect((serverName,serverPort))

sentence = raw_input(Input lowercase sentence:)

clientSocket.send(sentence)

modifiedSentence = clientSocket.recv(1024)

print From Server:, modifiedSentence

clientSocket.close()

Choose either TCP or UDP version of the echo server/client, modify it to accomplish the following function: Server side program should accept a parameter as the port number that it will listen on for incoming request, if no parameter is provided, then 9999 is used by default. User(e.g. me) runs the client program to connect to server. Client program should accept two parameters that allow user to specify the server address and port number. The client program reads a sentence typed in by user via keyboard, and user can select a command, then it sends both the command and the sentence to the server. Upon receipt of the sentence and command, server converts all the letters in the sentence into uppercase letters or lower letters or other format based on the received command, and sends the result back to the client. Client program displays the replied sentence on the screen. Your server should support at least three commands: all uppercase, all lowercase, and another commands that you designed(something like initial caps, reverse each word, reverse the entire sentence, etc.). Make sure test your program before submission, you'll receive 0 if your programs contains syntax errors! Include a README document for instructions on how to run your program.

-provide a document describing your protocol, i.e., underlying transport layer service, port numbers, the order and format of message sent and received by client/server, action associated with each message, etc. The document should provide enough information for others to implement client and server program to interact with yours.

How TCP or UDP would affect your application? Why you pick TCP over UDP?(Or vice versa) Is your protocol stateful or stateless? How does the other type of design would affect your application? (Hint: this has nothing to do with whether you use TCP or UDP). Is your server program able to communicate with multiple clients at the same time?