NETW 203 Lab 7.2.1.8 (Devry)

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NETW 203 Lab 7.2.1.8 (Devry)

Objectives

Part 1: Prepare Wireshark to Capture Packets

• Select an appropriate NIC interface to capture packets.

Part 2: Capture, Locate, and Examine Packets

• Capture a web session to http://www.google.com.

• Locate appropriate packets for a web session.

• Examine information within packets, including IP addresses, TCP port numbers, and TCP control flags.

Background / Scenario

In this lab, you will use Wireshark to capture and examine packets generated between the PC browser using the HyperText Transfer Protocol (HTTP) and a web server, such as www.google.com. When an application, such as HTTP or File Transfer Protocol (FTP) first starts on a host, TCP uses the three-way handshake to establish a reliable TCP session between the two hosts. For example, when a PC uses a web browser to surf the Internet, a three-way handshake is initiated and a session is established between the PC host and web server. A PC can have multiple, simultaneous, active TCP sessions with various web sites.

Note: This lab cannot be completed using Netlab. This lab assumes that you have Internet access.

Required Resources

1 PC (Windows 7, Vista, or XP with a command prompt access, Internet access, and Wireshark installed)