Which of the following wildcard masks is most useful for matching all IP packets in subnet 10.1.128.0, mask 255.255.255.0?

Nov 18, 2022 Last Updated: Nov 18, 2022 No Comments

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Which of the following wildcard masks is most useful for matching all IP packets in subnet 10.1.128.0, mask 255.255.255.0?

0.0.0.0
0.0.0.31
0.0.0.240
0.0.0.255
0.0.15.0
0.0.248.255

Explanation: 0.0.0.255 matches all packets that have the same first three octets. This is useful when you want to match a subnet in which the subnet part comprises the first three octets, as in this case.