Subnetting and IP Addressing Quiz

Which of the following binary subnet masks is invalid?

• 11111111 00000000 00000000 00000000

• 11111111 11111111 11111111 00000000

• 11111111 00000000 11111111 00000000

• 11111111 11111111 00000000 00000000

What does the "/24" in a subnet mask represent?

• 24 host bits

• 24 bits for subnet and host combined

• 24 bits in the prefix (subnet) part

• Subnet mask of 255.0.0.0

Which is the correct DDN format for the binary mask 11111111 11111111 11110000 00000000?

• 255.255.240.0

• 255.255.255.0

• 255.240.0.0

• 255.255.0.0

What does the subnet mask do to an IP address?

• Encrypts the host portion

• Divides it into MAC and IP

• Separates prefix and host parts

• Adds extra bits for security

How many total addresses are in a /29 subnet?

• 6

• 8

• 4

• 30

How many usable host addresses are in a /29 subnet?

• 6

• 8

• 2

• 4

What is the prefix value of the subnet mask 255.255.255.192?

• /26

• /25

• /24

• /23

Which of the following is not a valid subnet mask?

• 255.255.254.0

• 255.255.255.240

• 255.255.255.250

• 255.255.192.0

A /30 subnet provides how many usable host IP addresses?

• 4

• 2

• 6

• 8

What is the number of subnet bits when a Class C network is subnetted with a /30 mask?

• 4

• 6

• 2

• 8