Choose the wildcard mask that matches all IP packets in the subnet 46.45.44.0, and mask 255.255.255.0.

(A) 0.0.0.255
(B) 0.0.255.255
(C) 0.255.255.255
(D) 255.255.255.255

0.0.0.255 is the correct answer.

The wildcard mask 0.0.0.255 matches all packets that have the same first three octets. The wildcard mask is used to match a range of addresses and tells IOS to ignore parts of the address when making comparisons. Wildcard masks use two simple rules:

1. When the decimal is 0 then the router has to compare the octet.
2. When the decimal is 255 then the router has to ignore the octet.