User's Manual

ZyAIR B-2000 Wireless LAN Gateway with 4-Port Switch
Z IP Subnetting
Chart 10 Subnet 4
NETWORK NUMBER LAST OCTET BIT VALUE
IP Address 192.168.1. 192
IP Address (Binary) 11000000.10101000.00000001.
11000000
Subnet Mask (Binary) 11111111.11111111.11111111.
11000000
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
More Subnets
Similarly use a 27-bit mask to create 8 subnets (001, 010, 011, 100, 101, 110) and so on.
The following table is a summary for class “C” subnet planning.
Chart 11 Class C Subnet Planning
NO. “BORROWED” HOST
BITS
SUBNET MASK NO. SUBNETS NO. HOSTS PER
SUBNET
1 255.255.255.128 (/25) 2 126
2 255.255.255.192 (/26) 4 62
3 255.255.255.224 (/27) 8 30
4 255.255.255.240 (/28) 16 14
5 255.255.255.248 (/29) 32 6
6 255.255.255.252 (/30) 64 2
7 255.255.255.254 (/31) 128 1
Subnetting With Class A and Class B Networks.
For class “A” and class “B” addresses the subnet mask also determines which bits are part of the network
number and which are part of the host ID.
A class “B” address has two host ID octets available for subnetting and a class “A” address has three host
ID octets (see Chart 1) available for subnetting.
The following table is a summary for class “B” subnet planning.