Well DA-300N, User Manual

Page: 201 / 212

User’s Guide IP Addresses, Network Masks, and Subnets
255.255.255.192 or 11111111. 11111111.
11111111.11000000
The two extra bits in field4 can have four values (00, 01, 10, 11),
so there are four subnets. Each subnet uses the remainin
bits in field4 for its host IDs, ranging from 1 to 62.
g six
S subnet mask does not specify any additional ometimes a
network ID bits, and thus no subnets. Such a mask is called a
default subnet mask
. These masks are:
Class A: 255.0.0.0
Note
Class B: 255.255.0.0
Cl 255.255.255.0 ass C:
T hese are called
default
because they are used when a network is
in itially configured, at which time it has no subnets.
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