Chart H-5 Subnet 1; Chart H-6 Subnet 2 - ZyXEL Communications VANTAGE RADIUS 50 User Manual

Vantage RADIUS User's Guide
Subnet Mask
Subnet Mask (Binary)
The first three octets of the address make up the network number (class "C"). You want to have
two separate networks.
Divide the network 192.168.1.0 into two separate subnets by converting one of the host ID bits of
the IP address to a network number bit. The "borrowed" host ID bit can be either "0" or "1" thus
giving two subnets; 192.168.1.0 with mask 255.255.255.128 and 192.168.1.128 with mask
255.255.255.128.
indicate host ID bits "borrowed" to form network ID bits. The
number of "borrowed" host ID bits determines the number of
subnets you can have. The remaining number of host ID bits
(after "borrowing") determines the number of hosts you can
have on each subnet.
IP Address
IP Address (Binary)
Subnet Mask
Subnet Mask (Binary)
Subnet Address: 192.168.1.0
Broadcast Address: 192.168.1.127
IP Address
IP Address (Binary)
Subnet Mask
H-4
255.255.255.
11111111.11111111.11111111.
In the following charts, shaded/bolded last octet bit values

Chart H-5 Subnet 1

NETWORK NUMBER
192.168.1.
11000000.10101000.00000001.
255.255.255.
11111111.11111111.11111111.

Chart H-6 Subnet 2

NETWORK NUMBER
192.168.1.
11000000.10101000.00000001.
255.255.255.
0
00000000
LAST OCTET BIT VALUE
0
00000000
128
10000000
Lowest Host ID: 192.168.1.1
Highest Host ID: 192.168.1.126
LAST OCTET BIT VALUE
128
10000000
128
IP Subnetting