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posted by  swth on 7/22/2008 11:16:31 AM  |  status: Live  

CS

Course Textbook Chapter Problem
Networking Computer Networking: A Top Down Approach , 4th edition. Jim Kurose, Keith Ross Addison-Wesley, July 2007. N/A N/A
Question Details:
 

1. Demultiplexing

Out of the packets below, show which ones will be delivered to the same socket.

#  Source IP Source Port Dest IP Dest Port Protocol

1  1.2.3.4 1234 5.6.7.8 5678 UDP

2  1.2.3.4 4321 5.6.7.8 5678 UDP

3  1.2.3.4 1234 5.6.7.8 8765 UDP

4  1.2.3.4 1234 5.6.7.8 5678 TCP

5  1.2.3.4 4321 5.6.7.8 5678 TCP

6  1.2.3.4 4321 5.6.7.8 8765 TCP

7  1.2.3.5 4321 5.6.7.8 8765 TCP
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posted by rachel (cramster SME) on 7/23/2008 12:29:05 AM  |  status: Live
Asker's Rating: None Provided    Moderator's Rating: N/A
Response Details:
Dear,
 
 Connection less protocol UDP demultiplexing is only based on destination port number. which  destination port number is same for any 2 or more packets those only deliver to the same socket.
 
 According to above definition Packets 1 and 2 will deliver to the same socket, since those two packets are in UDP and those packets have same destination port number(5678).
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