Information Technology Reference
In-Depth Information
fIgure 8.11
TCP/IP v4 subnetting chart
2
(X)
-2=Y
255
254
252
248
240
224
192
128
0
128
1
1
1
1
1
1
1
1
0
64
1
1
1
1
1
1
1
0
0
32
1
1
1
1
1
1
0
0
0
16
1
1
1
1
1
0
0
0
0
8
1
1
1
1
0
0
0
0
0
4
1
1
1
0
0
0
0
0
0
2
1
1
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
0 = Hosts, 1 = Subnets
X (POWER)
X
Y
2
x
2
x
2
x
2
x
2
x
2
x
2
x
2
x
2
x
2
x
2
x
2
x
2
x
2
x
2
x
8
16
32
64
128
256
512
1024
2048
4096
8192
16384
32768
65536
131072
-2
-2
-2
-2
-2
-2
-2
-2
-2
-2
-2
-2
-2
-2
-2
6
14
30
62
126
254
510
1022
2046
4094
8190
16382
32766
65534
131070
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
Watch the Y column on the lower end of the chart. This represents the number of
addresses available to you after the two reserved addresses have been removed. The
following exercises provide some examples.
subneT mask exerCIse 8.1
Class C, 10 hosts per subnet
You have a Class C address, and you require 10 hosts per subnet.
1.
Write down the following:
255.255.255.____
The blank is the number you need to fill in.
2.
Look under the Y column and choose the first number that is larger than 10 (the number
of hosts per subnet you need). You should have come up with 14.
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