Cisco Cybersecurity Essentials 14.2

Open Ended

How do wildcard masks differ from subnet masks in the way they match binary 1s and 0s?

Multiple Choice

Which wildcard mask would you use to match only the first three octets of an IPv4 address and ignore the last octet?

• 0.0.0.0

• 0.0.0.255

• 0.0.0.15

• 0.0.0.63

Multiple Choice

Which of the following wildcard masks would permit all hosts in the 192.168.1.0/24 network?

• 0.0.0.0

• 0.0.0.255

• 0.0.0.15

• 0.0.15.255

Multiple Select

Select both of the correct statements about the wildcard mask 0.0.15.255 as used in access control lists (ACLs).

• It permits all hosts in multiple /24 networks.

• It matches only a single host address.

• It ignores the last 12 bits of the address.

• It matches the first 20 bits of the address.

Multiple Choice

What is the resulting wildcard mask when you subtract the subnet mask 255.255.254.0 from 255.255.255.255?

• 0.0.0.255

• 0.0.1.255

• 0.0.2.255

• 0.1.1.255

Multiple Choice

In a wildcard mask, what does a bit value of 1 indicate?

• Match the corresponding bit value in the address

• Ignore the corresponding bit value in the address

• Set the bit to 0

• Set the bit to 1