On Jan 8, 2007, at 9:59 PM, Stephen Fisher wrote:

>
> On Mon, Jan 08, 2007 at 07:29:22PM -0000, Antonio Cassidy wrote:
>> It looks like the non standard characters in the image file are being
>> replaced by '.''s in the capture file.
>
> Yes, "non-printable" characters are replaced with periods when  
> displayed
> in Wireshark.

...and the image file is probably a binary file, so it doesn't have  
characters in it, it has raw byte values (i.e., numbers from 0 to 255  
or from -128 to 127) or multi-byte values (e.g., a 2-byte value would  
be a number from 0 to 65535 or from -32768 to 32767).
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