XOR?
Johan Bornman Integrated Systems Consulting (Pty) Ltd Cell: 082 783 3635 On 26 Jan 2012, at 18:21, Yiannis ----------- <[email protected]> wrote: > > Digging a bit further discovered that its all an XOR operation > > so if you want to allow networks 200.0.0.2, 200.0.0.4 and 200.0.0.6 > > then convert the last octets 2,4 and 6 in binary and perform XOR. > > > 2: 00000010 > 4: 00000100 > > 6: 00000110 > ------------------ XOR > 00000110 =6 > > so the mask will be 0.0.0.6 > > > > > > Date: Thu, 26 Jan 2012 20:13:41 +0530 > Subject: Re: [OSL | CCIE_RS] wildcard mask volume 1 lab 16 > From: [email protected] > To: [email protected] > CC: [email protected]; [email protected] > > patrick > > why it didnt block 200.0.0.1 , 200.0.0.3 and 200.0.0.5 > > > > > On Thu, Jan 26, 2012 at 7:42 PM, <[email protected]> wrote: > > Yiannis, > > 200.0.0.0 last octet 00000000 > 0.0.0.6 last octet 00000110 > > So the 2 and 4 bits of the last octet are don't care bits resulting in the > options below: > 00000000 0 > 00000010 2 > 00000100 4 > 00000110 6 > > So this part will deny 200.0.0.0, 200.0.0.2, 200.0.0.4 and 200.0.0.6 from > communicating. If you have no additional lines in your access-list nothing > will be communicated because of the implicit deny at the end though. > > Kind regards, > > Patrick Keja > > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Yiannis ----------- > Sent: 26 January 2012 14:51 > To: [email protected] > Subject: [OSL | CCIE_RS] wildcard mask volume 1 lab 16 > > > Hi guys, > > > If you have the following access list > > access-list 1 deny 200.0.0.0 0.0.0.6 > > could you please explain which networks will be allowed/denied and how you > arrive at the result? > > Thanks very much > yiannis > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com > > http://onlinestudylist.com/mailman/listinfo/ccie_rs > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com > > http://onlinestudylist.com/mailman/listinfo/ccie_rs > > > > -- > With Warmest Regards, > > CCIE KID > CCIE#29992 (Security) > > > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com > > http://onlinestudylist.com/mailman/listinfo/ccie_rs _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
