When I google the answers I founded them but did not understand them
Try it
It's for computer science
III) Exercise Three Open "Wireshark", then use the "File" menu and the "Open" command to open the file "Exercise Three.pcap". You should see 22 packets listed. These packets represent two different requests for web pages. Packets 1-7 involve the request for the web page www.yahoo.com. Packets 8-22 involve the request for the web page my.usf.edu. a) Compare the destination port in the TCP packet in frame 3 with the destination port in the TCP packet in frame 12. What difference do you see? What does this tell you about the difference in the two requests? The following table compares the two requests for web pages. For example, row i) shows that frames 1-2 and frames 8-9 represent the DNS lookups for each of the web requests Row www.yahoo.com my.usf.com Brief Explanation of Activity frames 1-2 DNS Request to find IP address for common name &DNS Response 8-9 1)3-5 Three-way handshake 10-12 13-20 21 "Get" request for web page First packet from web server with web page content 1V 6 v) b) Explain what is happening in row "ii" above. Why are there no frames listed for yahoo in row "iii"? Look at the "Info" column on frame 6. It says: "GET/ HTTP /1.1. What is the corresponding Info field for the my.usf.com web request (frame 21)? Why doesn't it read the same as in frame 6? c) III) Exercise Three Open "Wireshark", then use the "File" menu and the "Open" command to open the file "Exercise Three.pcap". You should see 22 packets listed. These packets represent two different requests for web pages. Packets 1-7 involve the request for the web page www.yahoo.com. Packets 8-22 involve the request for the web page my.usf.edu. a) Compare the destination port in the TCP packet in frame 3 with the destination port in the TCP packet in frame 12. What difference do you see? What does this tell you about the difference in the two requests? The following table compares the two requests for web pages. For example, row i) shows that frames 1-2 and frames 8-9 represent the DNS lookups for each of the web requests Row www.yahoo.com my.usf.com Brief Explanation of Activity frames 1-2 DNS Request to find IP address for common name &DNS Response 8-9 1)3-5 Three-way handshake 10-12 13-20 21 "Get" request for web page First packet from web server with web page content 1V 6 v) b) Explain what is happening in row "ii" above. Why are there no frames listed for yahoo in row "iii"? Look at the "Info" column on frame 6. It says: "GET/ HTTP /1.1. What is the corresponding Info field for the my.usf.com web request (frame 21)? Why doesn't it read the same as in frame 6? c)
