If this feature is checked, all PDUs destined for this computer AND all those detected by the computer NIC on the same network segment (i. If this feature is NOT checked, only PDUs destined for this computer will be captured. Setting Wireshark to capture packets in promiscuous mode Among those available in Capture Options, the two highlighted below are worth examination. Typically, for a computer this will be the connected Ethernet Adapter. From the Interface drop-down list, select the network adapter in use. The Options dialog provides a range of settings and filters which determine which and how much data traffic is captured.įirst, it is necessary to ensure that Wireshark is set to monitor the correct interface. To start data capture it is first necessary to go to the Capture menu and select the Options choice. When Wireshark is launched, the screen below is displayed. 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. For information and to download the program go to - Wireshark. 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. This enables it to display the encapsulation and individual fields of a PDU and interpret its meaning. Wireshark is programmed to recognize the structure of different network protocols.

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.

Before June 2006, Wireshark was known as Ethereal.Ī 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.

Experiment with Wireshark features and options such as PDU capture and display filtering.īackground Wireshark is a software protocol analyzer, or 'packet sniffer' application, used for network troubleshooting, analysis, software and protocol development, and education.

Be able to perform basic PDU analysis on straightforward network data traffic.

Be able to perform basic PDU capture using Wireshark.

Order custom essay Using Wireshark to View Protocol Data Units Learning

How to use wireshark step by step