What wildcard mask would an administrator use for the network 192.168.181.0 255.255.254.0 in OSPF?

To determine the correct wildcard mask for the network 192.168.181.0 with a subnet mask of 255.255.254.0, it is essential to understand how to convert the subnet mask to a wildcard mask.

The subnet mask 255.255.254.0 indicates that the first 23 bits are used for the network part (255.255.254.0 in binary is 11111111.11111111.11111110.00000000). The remaining bits (the last 9 bits) are used for host addresses. The wildcard mask is calculated by subtracting the subnet mask from 255.255.255.255.

For the subnet mask 255.255.254.0, the calculations for the wildcard mask would look like this:

• For 255: 255 - 255 = 0

• For 255: 255 - 255 = 0

• For 254: 255 - 254 = 1

• For 0: 255 - 0 = 255

Putting these together, the wildcard mask becomes 0.0.1.255.

Therefore, the correct wildcard mask that matches the network 192.168.181