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║   PacketView provides the mechanism, using filters, to selectively  ║
║   store and view packets received from the network or read from a   ║
║   packet file.  The "Capture Filter" selects which network packets  ║
║   received from the packet driver or read from a packet file will   ║
║   be kept in the packet buffer.  Packets rejected by the capture    ║
║   filter are dropped and cannot be retrieved later.  Capture        ║
║   filters are useful when it is necessary to collect only specific  ║
║   types of packets from the network.  The "Display Filter" selects  ║
║   which packets from the packet buffer will be displayed (or saved  ║
║   when the packet buffer is saved to a file).  Since the packets    ║
║   remain in the packet buffer once captured, it is possible to      ║
║   modify display filters without losing packets from the packet     ║
║   buffer.  Display filters are used to view specific packet types   ║
║   from the packet buffer without losing packets not of immediate    ║
║   interest.                                                         ║
║                                                                     ║
║   A filter is a list of up to 5 match criteria which must all be    ║
║   true for a packet to be selected by the filter.  Packets must be  ║
║   selected by at least one filter to be saved or displayed.         ║
║                                                       [Page 1 of 2] ║
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║   The following function keys are defined for the Capture Filter    ║
║   and Display Filter screens:                                       ║
║                                                                     ║
║   Key     Description                                               ║
║   ---     -----------                                               ║
║   F1      Displays these help screens                               ║
║   F2      Define a new capture or display filter                    ║
║   F3      Modify a current capture or display filter                ║
║   F4      Delete a current capture or display filter                ║
║   F5      Enable a current capture or display filter                ║
║   F6      Temporarily disable a current capture or                  ║
║           display filter                                            ║
║   F8      Load a set of filters from a file, either                 ║
║           overwriting or added to the current filters               ║
║   F9      Save the current set of filters to a file                 ║
║   F10     Return to the Main Display                                ║
║                                                                     ║
║   Refer to the PacketView documentation for more information on     ║
║   defining and using capture and display filters.                   ║
║                                                       [Page 2 of 2] ║
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