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Suppose Client A initiates a Telnet session with Server S. At about the same time, Client B also initiates a Telnet session with Server S. Run telnet in a terminal and capture the traffic on Wireshark. For example, open a telnet session using this command: "telnet cs537.cs.csusm.edu". What are the source and destination port numbers for the following items?

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asarwar

Answer:

An answer to this question is given below in explanation section.

Explanation:

The given question is incomplete. First, we write the complete question that is:

Suppose Client A initiates a Telnet session with Server S. At about the same time, Client B also initiates a Telnet session with Server S. Run telnet in a terminal and capture the traffic on Wireshark. For example, open a telnet session using this command: "telnet cs537.cs.csusm.edu". What are the source and destination port numbers for the following items?

  1. the segment sent from A to S.
  2. the segment sent from B to S.
  3. the segment sent from S to A.
  4. the segment sent from S to B.
  5. if A and B are different hosts, is it possible that the source port number in the segments from A to S is the same as that from B to S?
  6. how about if they are the same host?

Answers

                           Source Port Numbers               Destination Port Number

  1. A -> S                      1467                                               23
  2. B -> S                       1513                                               23
  3. S->A                         23                                                  1467
  4. S->B                         23                                                  1513
  5. Yes, it is that the source port number in the segement from A to S is the same as that from B to S. In short, there is no relationship between port numbers on different hosts
  6. no, a port number identify UNIVOCALLY a process.