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Authors:
James F. Kurose, Keith W. Ross
Chapter:
Application Layer
Exercise:
Problems
Question:32 | ISBN:9780132856201 | Edition: 6

Question

Suppose that in UDPClient.py, after we create the socket, we add the line: clientSocket.bind(('', 5432))

Will it become necessary to change UDPServer.py? What are the port num- bers for the sockets in UDPClient and UDPServer? What were they before making this change?

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Answer

Refer chapter 2, section 2.7.1 of textbook for complete code of the UDPClient.py :

Moidfied code:

from socket import *
	.
	.
	#write the remaining code here
	.
	.
clientSocket = socket(socket.AF_INET, socket.SOCK_DGRAM)
clientSocket.bind((‘ ’, 5432))
message = raw_input(‘Input lowercase sentence:’)
	.
	.
	#write the remaining code here
	.
	.
clientSocket.close()

After modifications then the Port numbers of client and server:

DP Client port number         - 5432

UDP Server port number        - 12000

Before modifications the Port numbers of client and server :

UDP Client port number         - xxxx (number assigned by OS)

UDP Server port number        - 12000

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