Lantronix 10 manual Host Portion, Network Address, Broadcast Address

UDP

A router is required between all networks and all sub-networks. Generally, hosts can send packets directly only to hosts on their own sub-network. All packets destined for other subnets are sent to a router on the local network.

8.4.3 Host Portion

The host portion of the IP address is a unique number assigned to identify the host.

8.4.4 Network Address

A host address with all host bits set to 0 addresses the network as a whole (for example, in routing entries).

192.168.0.0

8.4.5 Broadcast Address

A host address with all host bits set to 1 is the broadcast address, meaning for “for every station.”

192.168.0.255

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.

IP Subnet Mask

An IP subnet mask divides IP address differently than the standards defined by the classes A, B, and C. An IP subnet mask defines the number of bits to be taken from the IP address as the network or host sections. The Device Server prompts for the number of host bits to be entered and then calculates the netmask, which is displayed in standard decimal-dot notation (for example, 255.255.255.0) when saved parameters are displayed.

Table 33 - Standard IP Network Netmasks

Network Class	Network Bits	Host Bits	Netmask
A	8	24	255.0.0.0
B	16	16	255.255.0.0
C	24	8	255.255.255.0

UDS-10 User Guide 8-15