dear experts, hello
why we use a wildcard in ospf network
configuration and not the subnet mask of the network, like net 10.0.0.0 0.0.0.255 and not net 10.0.0.0 255.255.255.0
so what is the reason for that.
thanks alot for your help
now it became very clear for me the defference between wildcard mask and subnet mask.
sorry for my another question, you gave me an excellent example but does this example exist in the real world, or in other words when i can write an example like that ( 10.1.0.0 0.255.0.255)
In the real world more often than not a wildcard mask will simply be the inverse of a subnet mask. But it's important to remember that it doesn't have to be and there have been a few occasions on this forum where i or others have helped someone come up with a wildcard mask that matches only certain addresses for an acl.
So it really depends on your requirements within your network, but yes non-contiguous wildcard masks are used in production environments.