Divide the subnet
Example: seven departments, eight subnet, borrow the host top three, respectively for 8 the subnet network address, the first and the last available address, the broadcast address?
211.85.9.00000000
211.85.9. '000' 00000, quotes to borrow a
Subnet mask: the network number + subnet number all expressed in 1
11111111.11111111.11111111.11100000
255.255.255.224
Eight is the number of wire:
000
001
010
011
100
101
110
110
Administration:
211.85.9. '000' 00000 network address
211.85.9. '000' 11111 broadcast address
211.85.9. '000' 00001 first available address
The last available 211.85.9. '000' 11110 address
Hr:
211.85.9. '001' 00000 network address
211.85.9. '001' 11111 broadcast address
211.85.9. '001' 00001 first available address
The last available 211.85.9. '001' 11110 address
.
Ditto the following departments religion

The last address is converted to a decimal, here not be converted