From: Emil Patel (emilpatel@hotmail.com)
Date: Thu Dec 22 2005 - 13:48:43 GMT-3
128 64 32 16 8 4 2 1
0 0 0 0 0 0 0 0
0 0 0 0 0 1 0 0
0 0 1 0 0 0 0 0
0 0 1 0 0 1 0 0
___________________________________________
0 0 1 0 0 1 0 0 = 36
All vertical bits are checked XOR and if they are:
(0+0)=0
(0+1)=1
(1+1)=0
(1+0)=1
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
nenad pudar
Sent: Wednesday, December 21, 2005 7:57 PM
To: bmcgahan@internetworkexpert.com; ccielab@groupstudy.com
Subject: Question for Brian McGahan and others
Hi Brian
I have the question regarding your paper on Computing Access-List and
Wildcard Pairs
There you have
00000000
00000100
00100000
00100100
_________
XOR
00100100=36****
I cannot get this trying in any way (for third column)
1) (((0 XOR 0) XOR 1) XOR 1)= ((0 XOR 1) XOR 1)= 1 XOR 1 =0
2) (0 XOR 0) XOR (1 XOR 1) = 0 XOR 0 = 0
I am doing something wrong or there is some other trick here ?
thanks
nenad
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