Wireshark Introduction

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Florida International University *

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4513

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Electrical Engineering

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Apr 3, 2024

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Wireshark Introduction

1. Your experience on installing Wireshark. I had no issues with the installation of Wireshark. The instructions provided in the module were very clear and precise. I was able to successfully capture the packets as displayed in the information provided below. Wireshark Lab 2. List 3 different protocols that appear in the protocol column in the unfiltered packet-listing window in step 7 above. Three different protocols that appeared in the protocol column are TCP, UDP and HTTP 3. 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.) Get was sent 19:13:17.881676 OK reply 19:13:17.914507 It took 32,831 milliseconds 4. What is the Internet address of the gaia.cs.umass.edu (also known as www-net.cs.umass.edu)? What is the Internet address of your computer?

a) The internet address of the gaia.cs.umas.edu is 128.119.245.12 b) The internet address of my computer is 10.0.0.67 5. Print the two HTTP messages (GET and OK) referred to in question 2 above. To do so, select Print from the Wireshark File command menu, and select the “Selected Packet Only” and “Print as displayed” radial buttons, and then click OK. No. Time Source Destination Protocol Length Info 22 19:13:17.881676 10.0.0.67 128.119.245.12 HTTP 530 GET /wireshark-labs/INTRO-wireshark- file1.html HTTP/1.1 Frame 22: 530 bytes on wire (4240 bits), 530 bytes captured (4240 bits) on interface \Device\ NPF_{DB11317A-FAB1-4D32-A71E-786BA7F862B7}, id 0 Ethernet II, Src: IntelCor_c8:0d:4d (94:65:9c:c8:0d:4d), Dst: Technico_72:01:eb (d4:b9:2f:72:01:eb) Internet Protocol Version 4, Src: 10.0.0.67, Dst: 128.119.245.12 Transmission Control Protocol, Src Port: 55950, Dst Port: 80, Seq: 1, Ack: 1, Len: 476 Hypertext Transfer Protocol No. Time Source Destination Protocol Length Info 26 19:13:17.914507 128.119.245.12 10.0.0.67 HTTP 492 HTTP/1.1 200 OK (text/html) Frame 26: 492 bytes on wire (3936 bits), 492 bytes captured (3936 bits) on interface \Device\ NPF_{DB11317A-FAB1-4D32-A71E-786BA7F862B7}, id 0 Ethernet II, Src: Technico_72:01:eb (d4:b9:2f:72:01:eb), Dst: IntelCor_c8:0d:4d (94:65:9c:c8:0d:4d) Internet Protocol Version 4, Src: 128.119.245.12, Dst: 10.0.0.67 Transmission Control Protocol, Src Port: 80, Dst Port: 55950, Seq: 1, Ack: 477, Len: 438 Hypertext Transfer Protocol

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Line-based text data: text/html (3 lines) No. Time Source Destination Protocol Length Info 48 19:13:18.473707 10.0.0.67 128.119.245.12 HTTP 476 GET /favicon.ico HTTP/1.1 Frame 48: 476 bytes on wire (3808 bits), 476 bytes captured (3808 bits) on interface \Device\ NPF_{DB11317A-FAB1-4D32-A71E-786BA7F862B7}, id 0 Ethernet II, Src: IntelCor_c8:0d:4d (94:65:9c:c8:0d:4d), Dst: Technico_72:01:eb (d4:b9:2f:72:01:eb) Internet Protocol Version 4, Src: 10.0.0.67, Dst: 128.119.245.12 Transmission Control Protocol, Src Port: 55950, Dst Port: 80, Seq: 477, Ack: 439, Len: 422 Hypertext Transfer Protocol No. Time Source Destination Protocol Length Info 49 19:13:18.517656 128.119.245.12 10.0.0.67 HTTP 538 HTTP/1.1 404 Not Found (text/html) Frame 49: 538 bytes on wire (4304 bits), 538 bytes captured (4304 bits) on interface \Device\ NPF_{DB11317A-FAB1-4D32-A71E-786BA7F862B7}, id 0 Ethernet II, Src: Technico_72:01:eb (d4:b9:2f:72:01:eb), Dst: IntelCor_c8:0d:4d (94:65:9c:c8:0d:4d) Internet Protocol Version 4, Src: 128.119.245.12, Dst: 10.0.0.67 Transmission Control Protocol, Src Port: 80, Dst Port: 55950, Seq: 439, Ack: 899, Len: 484 Hypertext Transfer Protocol Line-based text data: text/html (7 lines)