The packet-header details window provides details about the packet selected (highlighted) in the packet listing window.The protocol type field lists the highest level protocol that sent or received this packet, i.e., the protocol that is the source or ultimate sink for this packet. The packet listing can be sorted according to any of these categories by clicking on a column name. The packet-listing window displays a one-line summary for each packet captured, including the packet number (assigned by Wireshark this is not a packet number contained in any protocol’s header), the time at which the packet was captured, the packet’s source and destination addresses, the protocol type, and protocol-specific information contained in the packet.The Capture menu allows you to begin packet capture. The File menu allows you to save captured packet data or open a file containing previously captured packet data, and exit the Wireshark application. Of interest to us now are the File and Capture menus. The command menus are standard pulldown menus located at the top of the window.The Wireshark interface has five major components: Initially, no data will be displayed in the various windows. When you run the Wireshark program, the Wireshark graphical user interface shown in Figure 2 will de displayed. Wireshark is readily available free of charge, is open source, and is among the greatest package analyzers available now. But, with the dawn of Wireshark, that’s shifted. Previously, such tools were very costly, proprietary, or even both. You could think about a network packet analyzer as a measuring apparatus for analyzing what is happening within a network cable, exactly like an electrician utilizes a voltmeter for analyzing what is occurring inside an electrical cable (but in a high degree, obviously ). A network packet analyzer presents recorded packet information as much detail as you can.
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