I need a clarification on wild card masks.
1.Why wild card masks are used?
2.Why can't we use Subnetmask inplace of wild card mask , when both are represeting the same?
Please do not give the same answer of cisco as wild card mask is more flexible
If u r saying that please give me an example which subnetmask can not represent and wild card can.
It allows for faster processing of ACLs.
0 = care bit
1 = don't care bit
While the router reads the information from left to right, it's much faster to check the bits you care first and discard the 'don't care' - then move on to the next ACL entry.