ZyXEL Communications MWR211 - V1.0 Manual page 233

mask
29-bit 11111111
mask
.
Network Size
The size of the network number determines the maximum number of possible
hosts you can have on your network. The larger the number of network number
bits, the smaller the number of remaining host ID bits.
An IP address with host IDs of all zeros is the IP address of the network
(192.168.1.0 with a 24-bit subnet mask, for example). An IP address with host
IDs of all ones is the broadcast address for that network (192.168.1.255 with a
24-bit subnet mask, for example).
As these two IP addresses cannot be used for individual hosts, calculate the
maximum number of possible hosts in a network as follows:
Table 82 Maximum Host Numbers
SUBNET MASK
8 bits 255.0.0.0
16 255.255.0.0
bits
24 255.255.255.0 8 bits
bits
29 255.255.255.2
bits 48
Notation
Since the mask is always a continuous number of ones beginning from the left,
followed by a continuous number of zeros for the remainder of the 32 bit mask,
you can simply specify the number of ones instead of writing the value of each
MWR211 User's Guide
11111111 11111111
HOST ID SIZE
24
24 bits 2
16
16 bits 2
8
2 – 2
3
3 bits 2 – 2
233
11111000 255.255.255.24
8
MAXIMUM NUMBER OF
HOSTS
– 2 16777214
– 2 65534
254
6