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10-2
UDS-10 User Guide
10.4 Network Address
The host address with all host bits set to 0 is used to address the network as a whole (in
routing entries, for example).
10.5 Broadcast Address
The address with the host part bits set to 1 is the broadcast address, meaning for every station.
Network and broadcast addresses must not be used as a host address (for example,
192.168.0.0 identifies the entire network and 192.168.0.255 identifies the broadcast address).
10.6 IP Netmask
The netmask is used to divide the IP address differently from the standard defined by classes
A, B, C. A netmask defines how many bits from the IP address are to be taken as the network
section and how many bits are to be taken as the host section. When the number of host bits is
entered, the UDS-10 calculates the netmask. The netmask is displayed in standard decimal-
dot notation.
Network Bits Host Bits Netmask
Class A 8 24 255.0.0.0
Class B 16 16 255.255.0.0
Class C 24 8 255.255.255.0
Netmask Host bits
255.255.255.252 2
255.255.255.248 3
255.255.255.240 4
255.255.255.224 5
255.255.255.192 6
255.255.255.128 7
255.255.255.0 8
255.255.254.0 9
255.255.252.0 10
255.255.248.0 11
. .
. .
255.128.0.0 23
255.0.0.0 24