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Networking Fundamentals Lab work week 5 By Gabriel Pratadaja
Networking Fundamentals (41092)
University of Technology Sydney
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UTS Diploma
Network Fundamentals
LAB WORK WEEK 5
By: Gabriel Pratadaja
Select one UDP packet from your trace. From this packet, determine how many fields there are in the UDP header. (You shouldn’t look in the textbook! Answer these questions directly from what you observe in the packet trace.) Name these fields. Ans: The header only contains 4 fields: the source port, destination port, length, and checksum.
What is the largest possible source port number? (Hint: see the hint in 4.) Ans: The largest number of source port possible is 2 16
What is the protocol number for UDP? Give your answer in both hexadecimal and decimal notation. To answer this question, you’ll need to look into the Protocol field of the IP datagram containing this UDP segment (see Figure 4 in the text, and the discussion of IP header fields). Ans:
Examine a pair of UDP packets in which your host sends the first UDP packet and the second UDP packet is a reply to this first UDP packet. (Hint: for a second packet to be sent in response to a first packet, the sender of the first packet should be the destination of the second packet). Describe the relationship between the port numbers in the two packets.
UDP sent By My host
Networking Fundamentals Lab work week 5 By Gabriel Pratadaja
Course: Networking Fundamentals (41092)
University: University of Technology Sydney
