I understood from here 255.255.254.255 is wildcard mask and normally it means 0.0.1.0 .
1 means I do care that bit and 0 means I do not care.Since 1 isd the least significant bit and in the network portion is zero ,having 0 in the that bit is a must. Is my understanding correct? On Fri, Mar 5, 2010 at 9:07 PM, Joe Astorino <[email protected]> wrote: > The access-list you have below will only allow networks with an even third > octet. Since it denies everything else, that would work. > > The logic here is that the least significant bit of the third octet must be > equal to a 0. Therefore, only evens are permitted since all even networks > end with a 0. > > On Fri, Mar 5, 2010 at 2:02 PM, Mustafa Yadav > <[email protected]>wrote: > >> hi all, >> I have read in one question asked do not want odd in third octet .I am >> not pretty sure about the answer but it was something like below.Can someone >> clarify the llogic behind it? >> >> access-list 1 permit 0.0.0.0 255.255.254.255 >> >> _______________________________________________ >> For more information regarding industry leading CCIE Lab training, please >> visit www.ipexpert.com >> >> > > > -- > Regards, > > Joe Astorino CCIE #24347 (R&S) > Sr. Technical Instructor - IPexpert > Mailto: [email protected] > Telephone: +1.810.326.1444 > Live Assistance, Please visit: www.ipexpert.com/chat > eFax: +1.810.454.0130 > > IPexpert is a premier provider of Classroom and Self-Study Cisco CCNA (R&S, > Voice & Security), CCNP, CCVP, CCSP and CCIE (R&S, Voice, Security & Service > Provider) Certification Training with locations throughout the United > States, Europe and Australia. Be sure to check out our online communities at > www.ipexpert.com/communities and our public website at www.ipexpert.com > > >
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