UDP Multiplexing and Demultiplexing
In the scenario below, the left and right clients communicate with a server using UDP sockets. The same socket at the server is used to communicate with both clients. The Python code used to create the sockets is shown in the figure. Consider the four transport-layer packets – A, B, C and D – shown in the figure below.
Question List
1. What is the source port # for packet D?
2. What is the destination port # for packet D?
3. What is the source port # for packet C?
4. What is the destination port # for packet C?
5. What is the source port # for packet B?
6. What is the destination port # for packet B?
7. What is the source port # for packet A?
8. What is the destination port # for packet A?
Solution
1. The source port for packet D is port 7138.
2. The destination port for packet D is port 6727.
3. The source port for packet C is port 6727.
4. The destination port for packet C is port 7138.
5. The source port for packet B is port 7138.
6. The destination port for packet B is port 6727.
7. The source port for packet A is port 6727.
8. The destination port for packet A is port 7138.
That's incorrect
That's correct
The answer was: 7138
The answer was: 6727
The answer was: 6727
The answer was: 7138
The answer was: 7138
The answer was: 6727
The answer was: 6727
The answer was: 7138