TCP: Wireshark

Steps to follow:

  1. Start up your web browser. Go the http://gaia.cs.umass.edu/wiresharklabs/alice.txt and retrieve an ASCII copy of Alice in Wonderland. Store this file somewhere on your computer.
  2. Next go to http://gaia.cs.umass.edu/wireshark-labs/TCP-wireshark-file1.html.
  3. Use the Browse button in this form to enter the name of the file (full path name) on your computer containing Alice in Wonderland (or do so manually). Don’t yet press the “Upload alice.txt file” button.
  4. Now start up Wireshark and begin packet capture (Capture->Start) and then press OK on the Wireshark Packet Capture Options screen (we’ll not need to select any options here).
  5. Returning to your browser, press the “Upload alice.txt file” button to upload the file to the gaia.cs.umass.edu server. Once the file has been uploaded, a short congratulations message will be displayed in your browser window.
  6. Stop Wireshark packet capture. Your Wireshark window should look similar to the window shown below.

Untitled

Questions about the capture:

1) What is the IP address and TCP port number used by the client computer (source) that is transferring the file to gaia.cs.umass.edu?

La IP es 192.168.1.9

El puerto es 34594

Internet Protocol Version 4, Src: 192.168.1.9, Dst: 128.119.245.12 Transmission Control Protocol, Src Port: 34594, Dst Port: 80, Seq: 0, Len: 0

2) What is the IP address of gaia.cs.umass.edu? On what port number is it sending and receiving TCP segments for this connection?

La IP es 128.119.245.12

El puerto es 80

Internet Protocol Version 4, Src: 128.119.245.12, Dst: 192.168.1.9 Transmission Control Protocol, Src Port: 80, Dst Port: 34594, Seq: 0, Ack: 1, Len: 0