Dynacord DPM 8016, Руководство по эксплуатации, Страница: 36 / 40

correspond to the suffix /24, because with the subnet mask 255.255.255.0, the first 24 places
of an IP address are selected as the network address (binary format). The choice of subnet
mask and the resulting different split of the IP address into network element and host element
have an effect on the maximum number of addressable devices within a network. For the
specific number, however, the host element must neither be composed entirely of zeros or
entirely of ones in binary form.
Example:
In the example IP address of 130.9.122.195 with a subnet mask of 255.255.255.0 given above,
the network element would be 130.9.122.0. Each device (or interface) in the network would
therefore use an IP address of 130.9.122.DDD. Since it is not possible to use the binary values
00000000 or 11111111 for the host element DDD, the decimal values 1 through 254 are
permissible for DDD. This means that a maximum of 254 different devices are addressable in
the network, with possible IP addresses from 130.9.122.1 through 130.9.122.254.
36 en | Appendix DPM 8016
16-Dec-13 | 02 | F01U259190 Operation manual