sonet

 Profile Answers by sonet 

• Aug 4th, 2010

 

When you want to match certain bits of the IP address and ignore some bits, then you mask the IP address with 0 in bits you want to match and 1 where you want to ignore. The resulting mask is the wildcard mask.

Say, the ip address is 172.16.0.0

and you want to match first 16 bits and ignore last 16 bits,then the mask you use is 0.0.255.255.
 
0.0.255.255 is the wild card mask

Santhosh

• Nov 20th, 2012

 

wildcard mask is contrast to the subnet mask .
for ex . take an class c ip add . 192.168.10.1/24 for this subnet mask will be 255.255.255.0 !
wildcard mask is just opposite to subnet mask ,
wildcard mask for this ip address is 0.0.0.255.