1. What is the IP deal with and TCP port number supplied by the client computer (source) that is transferring the file to gaia.cs.umass.edu? To answer this question, it’s probably most basic to pick an HTTP message and also discover the details of the TCP packet used to carry this HTTP message, utilizing the “details of the schosen packet header window” (refer to Figure 2 in the “Getting Started with Wireshark” Lab if you’re unspecific around the Wireshark windows.

You are watching: What is it in the segment that identifies the segment as a syn segment?

IP deal with

TCP port: 1514



2. What is the IP attend to of gaia.cs.umass.edu? On what port number is it sfinishing and also receiving TCP segments for this connection?

IP address:

TCP port: 60

3. What is the IP address and also TCP port number provided by your client computer

(source) to deliver the file to gaia.cs.umass.edu?


IP addresses and also TCP port numbers

4. What is the sequence number of the TCP SYN segment that is provided to initiate the TCP connection between the client computer system and also gaia.cs.umass.edu? What is it in the segment that identifies the segment as a SYN segment?

It is supplied to initiate the TCP connection and also the value is 0. The SYN flag identifies it as a SYN segment and its set to 0.


5. What is the sequence number of the SYNACK segment sent out by gaia.cs.umass.edu to the client computer in reply to the SYN? What is the value of the Acknowledgement field in the SYNACK segment? How did gaia.cs.umass.edu determine that value? What is it in the segment that identifies the segment as a SYNACK segment?

The sequence number of SYNACK segment has the value of 0, not collection.




6. What is the sequence variety of the TCP segment containing the HTTP POST

command? Keep in mind that in order to uncover the POST command also, you’ll need to dig into

the packet content field at the bottom of the Wireshark window, looking for a

segment through a “POST” within its DATA area.



Has the worth of 1.

7. Consider the TCP segment containing the HTTP POST as the initially segment in the TCP link. What are the sequence numbers of the first 6 segments in the TCP link (including the segment containing the HTTP POST)? At what

time was each segment sent? When was the ACK for each segment received?

Given the difference in between once each TCP segment was sent out, and also as soon as its

acknowledgement was received, what is the RTT worth for each of the six

segments? What is the EstimatedRTT value?



8. What is the size of each of the first 6 TCP segments?

The first was 565bytes, then the remainder were 1460 bytes.



9. What is the minimum amount of available buffer room advertised at the got for the whole trace? Does the absence of receiver buffer area ever before throttle the sender?

minimum is 5840 bytes, yet this will thrive till a max of 62000 bytes.

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10. Are tright here any kind of retransmitted segments in the trace file? What did you examine for (in the trace) in order to answer this question?

No, tright here were no retransmitted segments. You deserve to examine by checking sequence numbers of TCP segments in map file.




11. How a lot information does the receiver frequently acknowledge in an ACK? Can you

identify situations wbelow the receiver is ACKing eextremely other received segment?


12. What is the throughput (bytes transferred per unit time) for the TCP connection?