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XOR for Computing ACL Masks
I was using http://mathworld.wolfram.com/XOR.html as a reference. I am interested in the specific process (steps) that were used in the example.
Brian
—–Original Message—– From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Mienbaikebi Patani Sent: Friday, July 28, 2006 9:00 AM To: Brian Cc: ccielab@groupstudy.com Subject: Re: XOR for Computing ACL Masks
I think the XOR works such that u need to have equal number of 0 and 1 for the result to be equal to 1. Anything other than equal number of 0 and 1 results in a value equal to 0.
Hope that was informative brother.
On 7/28/06, Brian wrote: > > I have been looking at the following example on how to calculate an > appropriate mask. > http://www.internetworkexpert.com/resources/01700370.htm. While I > understand the process that was use (and it works well) I cannot figure > out how the mask was calculated using XOR in example 2. If I understand > XOR correctly anytime there are an even number of 1’s in a computation > the result of XOR will be 0. When there are an odd number of 1’s the > result will be 1. This does not seem to hold true in the example. > > Can someone please help me understand how XOR was applied to come up > with the mask in example 2. Specifically the second octet is where the > confusion comes in. The only conclusions I can draw are that this is > not truly an XOR or I do not understand XOR. > > By the way I tried to XOR 0011 in the MS calculator and the result is 0. > > Thanks! > >
