Question

Suppose Client A initiates an SMTP session with Server Z. At about the same time, Client B also initiates an SMTP session with Server Z. Provide possible source and destination port numbers for the below segments, assuming that port number 49500 is assigned to the client process on Client A, and port number 49800 is assigned to the client process on Client B. Note: SMTP service is accessible on port 25. The segments sent from A to Z Source port= 49500, Destination port= 25 The segments sent from Z to A Source port= 25, Destination port= 49500 The segments sent from B to Z Source port= 49800, Destination port= 25 The segments sent from Z to B Source port= 25, Destination port= 49800 If A and B are different hosts, is it possible that the source port number in the segments from A to Z is the same as that from B to Z? Explain. If A and B are Same hosts, is it possible that the source port number in the segments from A to Z is the same as that from B to Z? Explain.

          Suppose Client A initiates an SMTP session with Server Z. At about the same time, Client B also initiates an SMTP session with Server Z. Provide possible source and destination port numbers for the below segments, assuming that port number 49500 is assigned to the client process on Client A, and port number 49800 is assigned to the client process on Client B. Note: SMTP service is accessible on port 25.

The segments sent from A to Z Source port= 49500, Destination port= 25
The segments sent from Z to A Source port= 25, Destination port= 49500
The segments sent from B to Z Source port= 49800, Destination port= 25
The segments sent from Z to B Source port= 25, Destination port= 49800

If A and B are different hosts, is it possible that the source port number in the segments from A to Z is the same as that from B to Z? Explain.

If A and B are Same hosts, is it possible that the source port number in the segments from A to Z is the same as that from B to Z? Explain.

Added by Michael W.

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