![]() ![]() Select the first ICMP Echo Request message sent by your computer, and expand the Internet Protocol portion in the details of selected packet header"window. If the arrow points up, click on the Source column header again. Next, sort the traced packets according to IP source address by clicking on the Source column header a small downward pointing arrow should appear next to the word Source. Has this IP datagram been fragmented? Explain how you determined whether or not the datagram has been fragmented. How many bytes are in the IP header? How many bytes are in the payload of the IP datagram? Explain how you determined the number of payload bytes. Within the IP packet header, what is the value in the upper layer protocol field? 5. What is the IP address of your computer? 4. What is the IP address of your computer? 3. 43 Page COE332: Computer Networks/ Students' Lab Manual 2. ![]() Computer Engineering Department, Taibah University. Once you have downloaded the trace, you can load it into Wireshark and view the trace using the File pull down menu, choosing Open, and then selecting the ip- ethereal-trace-1 trace file. The traces in this zip file were collected by Wireshark running on one of the author's computers, while performing the steps indicated in the Wireshark lab. Laatat ca 1.1.1.100.101 r er langth 20 rent Gatti tutti F G Free zameras COMEROLOG DAGO DI 34 Download the zip file and extract the file ip- ethereal-trace-1. CanalSATIES TONY LAmar Wax 20 Den TOGERIE TORLARI Ethernet (a). Select the first ICMP Echo Request message sent by your computer, and expand the Internet Protocol part of the packet in the packet details window. To print a packet, use File->Print, choose Selected packet only, choose Packet summary line, and select the minimum amount of packet detail that you need to answer the question. When you hand in your assignment, annotate the output so that it's clear where in the output you're getting the information for your answer (e.g., for our classes, we ask that students markup paper copies with a pen, or annotate electronic copies with text in a colored font). Whenever possible, when answering a question below you should hand in a printout of the packet(s) within the trace that you used to answer the question asked. ![]() In the questions below, we'll assume you are using a Windows machine the corresponding questions for the case of a Unix machine should be clear. In your trace, you should be able to see the series of ICMP Echo Request (in the case of Windows machine) or the UDP segment (in the case of Unix) sent by your computer and the ICMP TTL-exceeded messages returned to your computer by the intermediate routers. ![]()
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