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 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 C?
8. What is the destination port # for packet C?
Solution
1. The source port for packet D is port 5454.
2. The destination port for packet D is port 5669.
3. The source port for packet B is port 5454.
4. The destination port for packet B is port 7274.
5. The source port for packet A is port 7274.
6. The destination port for packet A is port 5454.
7. The source port for packet C is port 5669.
8. The destination port for packet C is port 5454.
That's incorrect
That's correct
The answer was: 5454
The answer was: 5669
The answer was: 5454
The answer was: 7274
The answer was: 7274
The answer was: 5454
The answer was: 5669
The answer was: 5454