An administrator is configuring single-area OSPF and must advertise the network 10.27.27.0 255.255.255.0. What wildcard mask should be used?

To advertise the network 10.27.27.0 with a subnet mask of 255.255.255.0 in a single-area OSPF configuration, the appropriate wildcard mask must allow all host addresses within that subnet while identifying the network itself.

The subnet mask of 255.255.255.0 indicates that the first three octets (10.27.27) of the address are fixed for network identification, while the last octet can vary for host identification. In wildcard masking, a 0 indicates that the corresponding bit in the address must match exactly, while a 1 means that any value is acceptable.

Thus, for the subnet mask of 255.255.255.0, the conversion to a wildcard mask is done by subtracting each octet from 255:

• For the first octet: 255 - 255 = 0

• For the second octet: 255 - 255 = 0

• For the third octet: 255 - 255 = 0

• For the fourth octet: 255 - 0 = 255

This calculation results in a wildcard mask of 0.0.0.255. This means that the OSP