AVM FRITZ!Box Fon WLAN 7113 Installation, Configuration And Operation page 114

Glossary
subnetwork
subnet mask
FRITZ!Box Fon WLAN 7113
A local IP network can consist of one subnetwork or be
divided into multiple subnetworks. The division into
subnetworks is performed when the local IP network is
configured. The subnetworks of a local IP network are also
IP networks.
The subnet mask indicates which part of an IP address is
the network address and which the address of the
computer. The network address defines what is called the
subnet.
Example 1
IP address:
Subnet mask:
The assignment of the first three groups of numerals in the
subnet mask indicates that the first three groups of numerals in
the IP address define the network. The following addresses
result:
Network address of the subnet: 192.168.178.0
Address of the computer in the
subnet:
IP address pool in the subnet:
114
192,168,178,247
255.255.255.0
192,168,178,247
192.168.178.0 -
192,168,178,255
The IP addresses
192.168.178.0 and
192.168.178.255 are
reserved. This means that the
addresses from
192.168.178.1 to
192.168.178.254 are
available for assignment to the
computers. Therefore a
maximum of 254 computers
can be included in the
subnetwork