Classful Subnetting

Which class of IP address provides the maximum number of host addresses per network?

• Class A

• Class B

• Class C

• Class D

Which of the following is a valid Class C subnet mask?

• 255.0.0.0

• 255.255.0.0

• 255.255.255.0

• 255.255.255.255

How many bits are used to define the network portion in a Class B address?

• 8

• 16

• 24

• 32

What is the default subnet mask for a Class A IP address?

• 255.0.0.0

• 255.255.0.0

• 255.255.255.0

• 255.255.255.255

How many subnets are available if you borrow 3 bits from the host portion in a Class C address?

• 2

• 4

• 6

• 8

In a Class C network, what is the maximum number of usable hosts per subnet?

• 254

• 256

• 128

• 62

Which class of IP addresses is used for multicast?

• Class A

• Class B

• Class C

• Class D

What is the first octet range for a Class B address?

• 1-126

• 128-191

• 192-223

• 224-239

What is the total number of subnets if you use a subnet mask of 255.255.255.192 in a Class C network?

• 2

• 4

• 6

• 8

In classful addressing, which class is reserved for experimental purposes?

• Class E

• Class D

• Class A

• Class B