Configure TCP/IP - MCSA Windows Server 2012 R2: Installation and Configuration Study Guide - page 406

exerCIse 8.1 (continued)

3. Move across the page and look at number in the X (Power) column. The power number

is 4.

4.

Go to the top of the chart and look for the row with exactly four 0s (hosts). Find the num-
ber at the beginning of the row.

The number at the beginning of the row is 240. That's your answer. The subnet mask should
be 255.255.255.240.

subneT mask exerCIse 8.2

Class C, 20 hosts per subnet

You have a Class C address, and you need 20 hosts per subnet.

1. Write down the following:

255.255.255.___

2. Look under the Y column and find the first number that covers 20. (This should be 30.)

3. Go across to the power number (5).

4. Go to the top part of the chart and find the row with exactly five 0s from right to left.

The number at the beginning of the row is 224. Your answer should be 255.255.255.224.

subneT mask exerCIse 8.3

Class C, five subnets

Now you have a Class C address, and you need five subnets. Remember that subnets are
represented by 1s in the chart.

1. Write down the following:

255.255.255.___

2. Look under the Y column and find the first number that covers 5. (This should be 6.)

3.

Go across to the power number. (This should be 3.)

4. Go to the top part of the chart and find out which row has exactly three 1s (remember, 1s

are for subnets) from left to right.

Your answer should be 255.255.255.224.