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Second bit set to false

asked 2021-10-18 17:42:45 +0000

Ferrybear23 gravatar image

updated 2021-10-19 15:15:20 +0000

I'm trying to determine if the second bit in a captured packet is set to false in a wireshark packet capture. How do I determine if a bit in a packet is set to true or false and what does that mean? Edit: trying to determine what the raw information of binary code actually means and where a second bit starts in a line.

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Whereabouts in the packet, do you mean in a specific protocol field?

grahamb gravatar imagegrahamb ( 2021-10-18 20:10:48 +0000 )edit

Or do you mean "the second bit in the raw packet data"?

Guy Harris gravatar imageGuy Harris ( 2021-10-18 22:41:08 +0000 )edit

In the raw packet data. But I'm in general confused as to what a bit set true or false even looks like.

Ferrybear23 gravatar imageFerrybear23 ( 2021-10-19 02:09:53 +0000 )edit

A bit can only have 2 states. 1 (aka: true) or 0 (aka: false) You could filter on it. Maybe you are even looking for: "eth.dst.lg == 0" But we coudl sure use some context here as the question is rather odd without a context.

hugo.vanderkooij gravatar imagehugo.vanderkooij ( 2021-10-19 14:29:02 +0000 )edit

Thanks for your answer. The context is it's a question I saw on a test I took and did not understand what it was looking for and I am generally unsatisfied with just having to guess and not knowing which was true or false.

Ferrybear23 gravatar imageFerrybear23 ( 2021-10-19 15:16:55 +0000 )edit

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answered 2021-10-19 14:30:16 +0000

hugo.vanderkooij gravatar image
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Asked: 2021-10-18 17:42:45 +0000

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Last updated: Oct 19