RAD Data comm ASMI-450 - Manual (Page 111)

SNMP Management
ASMi-450 Installation and Operation Manual B-7
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Host Portion. The host portion is used to identify an individual host
connected to the network. The host identifier is assigned by the using
organization, in accordance with its specific needs.
Note
The all-zero host identifier is always interpreted as a network identifier, and
must not be assigned to an actual host.
Often, the host portion is further sub-divided into two portions:
àSubnet number. For example, subnet numbers can be used to identify
departmental subnetworks. The subnet number follows the network
identifier.
àHost number - the last bits of the IP address.