Chapter 13 - Analyzing Subnet Masks

Question 1

What are 3 rules about mask formats?

Answer 1

1) The value must not interleave 1s and 0s.
2) If 1s exist, they are on the left.
3) If 0s exist, they are on the right.

Question 2

What is the decimal equivalent of the binary mask:

10000000 ?

Answer 2

128

Question 3

What is the decimal equivalent of the binary mask:

11000000 ?

Answer 3

192

Question 4

What is the decimal equivalent of the binary mask:

11100000 ?

Answer 4

224

Question 5

What is the decimal equivalent of the binary mask:

11110000 ?

Answer 5

240

Question 6

What is the decimal equivalent of the binary mask:

11111000 ?

Answer 6

248

Question 7

What is the decimal equivalent of the binary mask:

11111100 ?

Answer 7

252

Question 8

What is the decimal equivalent of the binary mask:

11111110 ?

Answer 8

254

Question 9

What is the decimal equivalent of the binary mask:

11111111 ?

Answer 9

255

Question 10

What is the concept that an IPv4 address has two parts - the prefix part plus the host part - as defined by the mask, with no consideration of the class (A, B, or C)?

Answer 10

Classless Addressing

Question 11

What is the concept that an IPv4 address has three parts - network, subnet, and host - as defined by the mask and Class A, B, and C rules?

Answer 11

Classful Addressing