ZyXEL Communications DMA-1000 Series, User Manual

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Appendix E IP Addresses and Subnetting
DMA-1000 Series User’s Guide
128
Example: Eight Subnets
Similarly, use a 27-bit mask to create eight subnets (000, 001, 010, 011, 100, 101, 110 and
111).
The following table shows IP address last octet values for each subnet.
Table 42 Subnet 2
IP/SUBNET MASK NETWORK NUMBER
LAST OCTET BIT
VALUE
IP Address 192.168.1. 64
IP Address (Binary) 11000000.10101000.00000001. 01 000000
Subnet Mask (Binary) 11111111.11111111.11111111. 11 000000
Subnet Address:
192.168.1.64 Lowest Host ID: 192.168.1.65
Broadcast Address:
192.168.1.127 Highest Host ID: 192.168.1.126
Table 43 Subnet 3
IP/SUBNET MASK NETWORK NUMBER
LAST OCTET BIT
VALUE
IP Address 192.168.1. 128
IP Address (Binary) 11000000.10101000.00000001. 10 000000
Subnet Mask (Binary) 11111111.11111111.11111111. 11 000000
Subnet Address:
192.168.1.128 Lowest Host ID: 192.168.1.129
Broadcast Address:
192.168.1.191 Highest Host ID: 192.168.1.190
Table 44 Subnet 4
IP/SUBNET MASK NETWORK NUMBER
LAST OCTET BIT
VALUE
IP Address 192.168.1. 192
IP Address (Binary) 11000000.10101000.00000001. 11 000000
Subnet Mask (Binary) 11111111.11111111.11111111. 11 000000
Subnet Address:
192.168.1.192 Lowest Host ID: 192.168.1.193
Broadcast Address:
192.168.1.255 Highest Host ID: 192.168.1.254
Table 45 Eight Subnets
SUBNET
SUBNET
ADDRESS
FIRST ADDRESS
LAST
ADDRESS BROADCAST
ADDRESS
1 0 1 30 31
2 32 33 62 63
3 64 65 94 95
4 96 97 126 127