ZyXEL Wireless Access Point G1000 91-005-124003B Manual De Usuario
Los códigos de productos
91-005-124003B
G-1000 User’s Guide
174
IP Subnetting
Example: Four Subnets
The above example illustrated using a 25-bit subnet mask to divide a class “C” address space
into two subnets. Similarly to divide a class “C” address into four subnets, you need to
“borrow” two host ID bits to give four possible combinations of 00, 01, 10 and 11. The subnet
mask is 26 bits (11111111.11111111.11111111.11000000) or 255.255.255.192. Each subnet
contains 6 host ID bits, giving 2
into two subnets. Similarly to divide a class “C” address into four subnets, you need to
“borrow” two host ID bits to give four possible combinations of 00, 01, 10 and 11. The subnet
mask is 26 bits (11111111.11111111.11111111.11000000) or 255.255.255.192. Each subnet
contains 6 host ID bits, giving 2
6
-2 or 62 hosts for each subnet (all 0’s is the subnet itself, all
1’s is the broadcast address on the subnet).
Table 77 Subnet 1
NETWORK NUMBER
LAST OCTET BIT
VALUE
VALUE
IP Address
192.168.1.
0
IP Address (Binary)
11000000.10101000.00000001.
00000000
Subnet Mask (Binary)
11111111.11111111.11111111.
11000000
Subnet Address: 192.168.1.0
Lowest Host ID: 192.168.1.1
Broadcast Address:
192.168.1.63
Highest Host ID: 192.168.1.62
Table 78 Subnet 2
NETWORK NUMBER
LAST OCTET BIT
VALUE
VALUE
IP Address
192.168.1.
64
IP Address (Binary)
11000000.10101000.00000001.
01000000
Subnet Mask (Binary)
11111111.11111111.11111111.
11000000
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 79 Subnet 3
NETWORK NUMBER
LAST OCTET BIT
VALUE
VALUE
IP Address
192.168.1.
128
IP Address (Binary)
11000000.10101000.00000001.
10000000
Subnet Mask (Binary)
11111111.11111111.11111111.
11000000
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