chapter 2 wireshark' - Lab 2.6.2: Using Wireshark to View...

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All contents are Copyright © 1992–2007 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 1 of 11 Lab 2.6.2: Using Wireshark™ to View Protocol Data Units Learning Objectives Be able to explain the purpose of a protocol analyzer (Wireshark). Be able to perform basic PDU capture using Wireshark. Be able to perform basic PDU analysis on straightforward network data traffic. Experiment with Wireshark features and options such as PDU capture and display filtering. Background Wireshark is a software protocol analyzer, or "packet sniffer" application, used for network troubleshooting, analysis, software and protocol development, and education. Before June 2006, Wireshark was known as Ethereal. A packet sniffer (also known as a network analyzer or protocol analyzer) is computer software that can intercept and log data traffic passing over a data network. As data streams travel back and forth over the network, the sniffer "captures" each protocol data unit (PDU) and can decode and analyze its content according to the appropriate RFC or other specifications. Wireshark is programmed to recognize the structure of different network protocols. This enables it to display the encapsulation and individual fields of a PDU and interpret their meaning. It is a useful tool for anyone working with networks and can be used with most labs in the CCNA courses for data analysis and troubleshooting. For information and to download the program go to - http://www.Wireshark.org Scenario To capture PDUs the computer on which Wireshark is installed must have a working connection to the network and Wireshark must be running before any data can be captured.
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CCNA Exploration Network Fundamentals: Communicating over the Network Lab 2.6.2: Using Wireshark™ to View Protocol Data Units All contents are Copyright © 1992–2007 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 2 of 11 When Wireshark is launched, the screen below is displayed. To start data capture it is first necessary to go to the Capture menu and select the Options choice. The Options dialog provides a range of settings and filters which determines which and how much data traffic is captured.
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CCNA Exploration Network Fundamentals: Communicating over the Network Lab 2.6.2: Using Wireshark™ to View Protocol Data Units All contents are Copyright © 1992–2007 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 3 of 11 First, it is necessary to ensure that Wireshark is set to monitor the correct interface. From the Interface drop down list, select the network adapter in use. Typically, for a computer this will be the connected Ethernet Adapter. Then other Options can be set. Among those available in
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This note was uploaded on 09/11/2010 for the course TN 635 taught by Professor Billlink during the Fall '10 term at Southeast Missori State University.

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chapter 2 wireshark' - Lab 2.6.2: Using Wireshark to View...

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