3Com OfficeConnect 3C19500 User Manual page 28

An example IP address is '192.168.100.8'. However, the size of
the network determines the structure of this IP Address. In using
the Network Storage Server, you will probably only encounter
two types of IP Address and subnet mask structures.
Type One
In a small network, the IP address of '192.168.100.8' is split into
two parts:
Part one ('192.168.100') identifies the network on which the
device resides.
Part two ('.8') identifies the device within the network.
192.168.100
Network
Address
This type of IP Address operates on a subnet mask of
'255.255.255.0'.
See Table 3 for an example about how a network with three PCs
and a Network Storage Server might be configured.
Table 3 IP Addressing and Subnet Masking
Device IP Address
PC 1 192.168.100.8
PC 2 192.168.100.33
PC 3 192.168.100.188
192.168.100.72
Network Storage
Server
.8
Device
Number
Subnet Mask
255.255.255.0
255.255.255.0
255.255.255.0
255.255.255.0
Type Two
In larger networks, where there are more devices, the IP address
of '192.168.100.8' is, again, split into two parts but is structured
differently:
Part one ('192.168') identifies the network on which the
device resides.
Part two ('.100.8') identifies the device within the network.
This type of IP Address operates on a subnet mask of
'255.255.0.0'.
See Table 4 for an example about how a network (only four PCs
represented) and a Network Storage Server might be configured.
Table 4 IP Addressing and Subnet Masking
Device IP Address
PC 1 192.168.100.8
PC 2 192.168.201.30
PC 3 192.168.113.155
PC 4 192.168.002.230
Network Storage 192.168.002.72
Server
28
192.168 .100.8
Network Device
Address Number
Subnet Mask
255.255.0.0
255.255.0.0
255.255.0.0
255.255.0.0
255.255.0.0