Technical data

C-4 IP Addressing 90362-01
Figure B-2. Example of a Class B Subnet Address
You can set the subnet mask to any number of bits equal to or greater than
the number of bits required by the Internet network address. However,
Telebit recommends aligning the subnet addresses on octet boundaries (that
is, 8, 16, or 24 bits). This simplifies the network design and avoids possible
routing problems, especially when Routing Information Protocol (RIP) is
used to propagate routing information throughout the network.
Once a subnet partition has been selected, all machines on the network must
use it; otherwise, routing problems may occur.
24-bit Subnet Address
Internet ID LAN ID Host ID