Subnetwork
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FRITZ!Box Fon 5124 – 7 Network Settings
Subnetwork
A local IP network can consist of one subnetwork or be divid-
ed 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.
Subnet Mask
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:
192.168.178.254
Subnet mask:
255.255.255.0
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:
192.168.178.254
IP address pool in the
subnet:
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.
Example 2
IP Address:
192.168.178.254
Subnet mask:
255.255.0.0
The assignment of the first two groups of numerals in the subnet
mask indicates that the first two groups of numerals in the IP
address define the network. The following addresses result:
