214

Table 6-16       Subnets for the 192.168.1.0 /24 Network with 2 Borrowed Bits

Subnet	Network Address	Host Range	Broadcast Address
0	192.168.1.0/26	192.168.1.1–192.168.1.62	192.168.1.63
1	192.168.1.64/26	192.168.1.65–192.168.1.126	192.168.1.127
2	192.168.1.128/26	192.168.1.129–192.168.1.190	192.168.1.191
3	192.168.1.192/26	192.168.1.193–192.168.1.254	192.168.1.255

Calculate the number of subnets with this formula:

2² = 4 subnets

To calculate the number of hosts, begin by examining the last octet. Notice these subnets:

Subnet 1:    0 = 00000000

Subnet 2:   64 = 01000000

Subnet 3: 128 = 10000000

Subnet 4: 192 = 11000000

Apply the host calculation formula:

2⁶ – 2 = 62 hosts per subnet

Creating Six Subnets

Consider the example in Figure 6-20 with five LANs and a WAN, for a total of six net-works. The network information for this example is shown in Table 6-17, and the calcula-tions follow.

Table 6-17       Subnets for the 192.168.1.0 /24 Network with 3 Borrowed Bits

Subnet	Network Address	Host Range	Broadcast Address
0	192.168.1.0/27	192.168.1.1–192.168.1.30	192.168.1.31
1	192.168.1.32/27	192.168.1.33–192.168.1.62	192.168.1.63
2	192.168.1.64/27	192.168.1.65–192.168.1.94	192.168.1.95
3	192.168.1.96/27	192.168.1.97–192.168.1.126	192.168.1.127
4	192.168.1.128/27	192.168.1.129–192.168.1.158	192.168.1.159
5	192.168.1.160/27	192.168.1.161–192.168.1.190	192.168.1.191
6	192.168.1.192/27	192.168.1.193–192.168.1.222	192.168.1.223
7	192.168.1.224/27	192.168.1.225–192.168.1.254	192.168.1.255