HW-5 Solutions

HW-5 Solutions - ECE3076, Summer 2006, HW-5 Due Thursday,...

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Unformatted text preview: ECE3076, Summer 2006, HW-5 Due Thursday, July 6 (noon) Do the " Ethereal Lab: IP ". Follow the instructions at the textbook Web site, http://www.aw-bc.com/kurose_ross/. You may answer the questions in the lab below, or on a separate sheet. Read "Ethereal Lab: IP" Instructions: 1. Select the first ICMP Echo Request (or UDP) message sent by your computer, and expand the Internet Protocol part of the packet in the packet details window. What is the IP address of your computer? _ 130.207.25.103 ( the student's legitimate IP dotted decimal address ) _______ 2. Within the IP packet header, what is the value in the upper layer protocol field? _ 17 (0x11) if UDP, 1 if ICMP _ 3. 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. Circle and label values on a screen shot. A. 20 bytes in IP header , B . 36 bytes , 56-20 (8 in UDP header + 28 in data payload ) 4. Has this IP datagram been fragmented? Explain how you determined whether or not the datagram has been fragmented. Not fragmented , FragFlag == 0 && Offset ==0 ___________________________________________________________________...
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HW-5 Solutions - ECE3076, Summer 2006, HW-5 Due Thursday,...

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