Wireshark mailing list archives
Re: Hex numbers and fields
From: Graham Bloice <graham.bloice () trihedral com>
Date: Mon, 10 Oct 2011 11:05:19 +0100
On 10/10/2011 09:02, Lisi wrote:
I'm sorry, I obviously don't know enough about networks for it to be sensible for me to use Wireshark. But I am where I am, and I want at least to try. What is the connection between the fields and the hex numbers at the bottom of the screen? I can see that there is one, but I couldn't even begin to use the hex numbers to enable me to describe the fields, which is what I am supposed to be doing. I need to go the other way round! And what are the letters, numbers, dots and symbols beside the hex numbers? I have Googled, I have searched the Wireshark site, I have searched the course text book. I cannot find anything that describes this.
Lisi, Assuming you mean the hex pane, that shows the contents of the capture at a very low level. Protocol information is transmitted over the chosen medium using some form of binary signalling, the binary bits are collected (usually) into bytes and hex is the commonly accepted human readable (to some folks) form to display that in. The characters beside the hex are the ASCII representation of the hex values, those values that don't have a character representation are shown as a dot. A protocol dissector takes the binary capture information and parses it into the fields you see in the protocol tree. If you select a field in the tree, values in the hex pane will be highlighted showing those values that make up that particular field in the protocol. -- Regards, Graham Bloice ___________________________________________________________________________ Sent via: Wireshark-users mailing list <wireshark-users () wireshark org> Archives: http://www.wireshark.org/lists/wireshark-users Unsubscribe: https://wireshark.org/mailman/options/wireshark-users mailto:wireshark-users-request () wireshark org?subject=unsubscribe
Current thread:
- Hex numbers and fields Lisi (Oct 10)
- Re: Hex numbers and fields Graham Bloice (Oct 10)
- Re: Hex numbers and fields Lisi (Oct 10)
- Re: Hex numbers and fields Graham Bloice (Oct 10)