TCP Multiplexing and Demultiplexing
In the scenario below, the left and right TCP clients communicate with a TCP server using TCP sockets. The Python code used to create a single welcoming socket in the server is shown in the figure (the welcoming socket itself is not shown graphically); code is also shown for the client sockets as well. The three sockets shown in server were created as a result of the server accepting connection requests on this welcoming socket from the two clients (one connection from the client on the left, and two connections from the client on the right).
Question List
1. What is the source port # for packet C?
2. What is the destination port # for packet C?
3. What is the source port # for packet B?
4. What is the destination port # for packet B?
5. What is the source port # for packet A?
6. What is the destination port # for packet A?
7. What is the source port # for packet D?
8. What is the destination port # for packet D?
Solution
1. The source port for packet C is port 6482.
2. The destination port for packet C is port 5172.
3. The source port for packet B is port 5172.
4. The destination port for packet B is port 7386.
5. The source port for packet A is port 7386.
6. The destination port for packet A is port 5172.
7. The source port for packet D is port 5897.
8. The destination port for packet D is port 5172.
That's incorrect
That's correct
The answer was: 6482
The answer was: 5172
The answer was: 5172
The answer was: 7386
The answer was: 7386
The answer was: 5172
The answer was: 5897
The answer was: 5172