Lantronix CoBox-Micro User Manual

IP Addresses Supplemental Information
E-16
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 E-15: 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
Table E-16: Netmask Examples
Netmask Host Bits
255.255.255.252 2
255.255.255.248 3
255.255.255.240 4
255.255.255.224 5
255.255.255.192 6
255.255.255.128 7
255.255.255.0 8
255.255.254.0 9
255.255.252.0 10
255.255.248.0 11
... ...
255.128.0.0 23
255.0.0.0 24

Lantronix CoBox-Micro Specifications

General

Brand	Lantronix
Model	CoBox-Micro
Category	Server
Language	English