Task 2: > No.. Time Source 1 0.000000 80.121.49.132 2 22.001637 128.238.4.150 3 22.231968 128.238.2.38 4 22.231968 128.238.4.150 5 22.412228 128.119.245.12 6 22.412228 128.238.4.150 7 22.412228 128.238.4.150 8 22.682616 128.119.245.12 9 22.752717 128.119.245.12 10 22.862876 128.238.4.150 11 32.687002 128.119.245.12 12 32.687002 128.238.4.150 13 32.767117 128.238.4.150 14 114.22424 128.238.4.150 15 114.53469 80.160.91.19 16 114.54470 128.238.4.150 17 114.55472. 128.238.4.150 18 114.55472 128.238.4.150 19 116.61768 128.238.4.150 20 117.51898. 128.238.4.150 21 123.52762. 128.238.4.150 Destination 128.238.4.150 128.238.2.38 128.238.4.150 128.119.245.12 128.238.4.150 128.119.245.12 128.119.245.12 128.238.4.150 128.238.4.150 128.119.245.12 128.238.4.150 128.119.245.12 128.119.245.12 80.160.91.19 128.238.4.150 80.160.91.19 128.119.17.190 128.119.17.190 128.119.17.190 128.119.17.190 128.119.17.190 Protocol Info TCP 2509 > 9898 [SYN] Seq=0 Ack=0 win=16384 Len=0 MS5=1380 DNS Standard query A gaia.cs.umass.edu DNS Standard query response A 128.119.245.12 TCP 1310 > http (SYN] Seq=0 Ack=0 win-8192 Len=0 MS5=1460 TCP http > 1310 (SYN, ACK] Seq=0 Ack=1 win=5840 Len=0 MS5=1380 TCP 1310 > http [ACK] Seq=1 Ack=1 win=8280 Len=0 HTTE GET /ethereal-labs /INTRO-ethereal-filel.html HTTP/1.1 TCP http > 1310 [ACK) Seq=1 Ack=425 win=6432 Len=0 HTTP HTTP/1.1 200 OK (text/html) TCP 1310 > http [ACK] Seq=425 Ack=393 win=7888 Len=0 TCP http > 1310 (FIN, ACK] Seq=393 Ack=425 win=6432 Len=0 TCP 1310 > http [ACK] Seq=425 Ack=394 win=7888 Len=0 TCP 1310 > http (RST, ACK] Seq=425 Ack=394 win=0 Len=0 UDP Source port: 3531 Destination port: 3531 UDP Source port: 3531 Destination port: 3531 UDP Source port: 3531 Destination port: 3531 TCP 1311 > 3531 (SYN] Seq=0 Ack=0 win=8192 Len=0 MSS=1460 UDP Source port: 3531 Destination port: 3531 UDP Source port: 3531 Destination port: 3531 TCP 1311 > 3531 [SYN] Seq=0 Ack=0 win=8192 Len=0 MS5=1460 TCP 1311 > 3531 [SYN] Seq=0 Ack=0 win=8192 Len=0 MS5=1460 top-ethereal-trece-1 - Ethereal OX File Edit View Go Capture Analyze Statistics Help xEgg Like: Expression... Clear Apply No. Time Source Destination rotocol Indo JU. LOCULO 192.168.1.10. 12. rePRED SWN SU NO W6384 Len 1920 2 0.00317212B. 119.245.12 192.168.1.102 TOP http> 1161 SR, X56Q- AK-1 win-5860 Len MS-160 3 0.02 3265 192.168.1.102 128.119.245.12 TCP 1163 > http (ACK Seqel Ack-1 Win-17520 Leno - 4.0.095477 192.168.1.100 128.119.245.12 POST Nethereal-labs/lab3-2-reply.htm HTTP/1.1 HTTP 5 0.041737 192.168.1.102 128.119.245.12 HTTP Continuation or non-HTTP traffic 6 0.05 3937 128,119,745.12 192.168.1.102 TOP http> 1161 [NOK Seq-1 Ack566 Win 6780 Leno 7 0.05 4026 192.168.1.102 128.119.245.12 HTTP 8 0.054690 192.168.1.102 continuation or non-HTTP traffic 128.119.345:19 continuation or non-HTTP traffic HTTP 9 0.077294 126.119.245.12 192.168.1.102 TCP htto 1161 ACK] Seq-1 Ack-2026 win-3760 Len- 10 0.077405 192.168.1.102 128.119.245.12 HTTP continuation or non-HTTP trafic 11 0.07BLS7 192.168.1.102 128.119.245.12 HTTP 17 0.124055 193.119.245.12 continuation or non-HTTP traffic continua 192.168.1.102 TOP http> 1161 Seq-1 Ack-3436 win-11630 Leno 13 0.124285 192.168.1.10 128.119.245.12 HTTP 10 LACROfic - 14 0.159118 13:119:24:15 119.245.13 192.168.1.103 TOP http> 1101 od seq-1 Ack-4946 win-1 4600 Leno 15 0.217299 128.119.245, 13 . 192.168.1.109 TOP http> 1161 fol seg-1 Ack-6006 win17520 Leno 16 0.267802 28.11.246.14 192.168.1.102 TCP 17 0.304807128. 119.245.12 NEED A Seal Ack7866 Win 20440 Leno 192.168.1.102 TOP 128.119.245.12 18 0. 305040 192.168.1.102 http1161 LACKSeq-1 Ack.9013 win-23360 Leno HTTP Continuation or non-HTTP traffic RRR 167 1689 176 119 12 24 Tim - Tart Frame 1 Co2 bytes on wire, oz bytes captured) Ethemet II. Src: Actionte 8a:70:la (00:20:e0:3a:20:1a). Ost: 192.168.1.1 (00:06:23:da af:73) Intemet Protocol, Srcs 192.168.1.102 (192.168.1.102), Ost: 328.119.245.12 (28.119.245.12) Transmission Control Protocol, Sre Port: 1161 (1161), Ost Port: http (80). Seq: 0, Ack: 0, Len: 0 TUDO OU 06. 25 da af 73 00 20 eu sa 70 ta 08 00 45 00 80 T ...5..DE .... 0010 00 30 Le id 40 00 80 05 a 18 co a8 02 56 80 77 0........... 0020 75 0c 04 89 00 50 0d 06 0 F4 00 00 00 00 70 02 ........... 0030 40 00 76 e9 00 00 02 04 05 04 01 01 04 02 File ::course Polyucs 68th real boxes top etherealbrace-1" 177 KB P: 2130:213 M. start Local Disk 3 Microso-petere 84 rew-Edt 5.3 Bom 11:49 w Record your responses Figure 1: IP addresses and TCP port numbers of the client computer (source) and gaia.cs.umass.edu 1. List the different protocols that appear in the protocol column in the unfiltered packet-listing window Answer the following questions for the TCP segments: 1. What is the IP address and TCP port number used by your client computer (source) to transfer the file to gaia.cs.umass.edu? 2. How long did it take from when the HTTP GET message was sent until the HTTP OK reply was received? (By default, the value of the Time column in the packet listing window is the amount of time, in seconds, since Wireshark tracing began. To display the Time field in time-of-day format, select the Wireshark View pull down menu, then select Time Display Format, then select Time-of-day.) 2. What is the IP address and port number used by gaia.cs.umass.edu to receive the file. 3. What is the sequence number of the TCP SYN segment that is used to initiate the TCP connection between the client
