00000001 and 00111111.11111110.
Step 8 Increment the subnet bits by 1 to determine the next subnet address.
Repeat Steps 4 through 8 for all subnets (01000000.00000000).
IP Address 10.172.16.211 Subnet Mask /18
IP Address 10
00001010
10
10
10
10
10
00001010
11111111
172
10101100
172
172
172
172
172
10101100
11111111
16
00000000
10000000
0
00 010000
11 000000
211
00000000
0
11010011
00000000
00000001=0.1
11111110=63.254
11111111=63.255
00000000=64.0
/18
IP Address
Subnet Mask
Subnetwork
Subnetwork
First Host
Last Host
Directed
Broadcast
Next Subnet
00000000
00111111
00111111
01000000
270 Chapter 4: LAN Connections
Table 4-5 shows the range of subnets and broadcast addresses that would be available with
the given subnet mask.
Summary of Constructing a Network Addressing Scheme
The following list summarizes the key points that were discussed in the previous sections:
?– Networks, particularly large ones, are often divided into smaller subnetworks, or
subnets. Subnets can improve network performance and control.
?– A subnet address extends the network portion and is created by borrowing bits from
the original host portion and designating them as the subnet ?¬?eld.
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