DAD AX32 - Understanding Subnet Masks; Subnet Mask Functionality

User Manual AX32
Doc no. AX32-8002-A-4 Rev. date 140124 Page 23 of 31
the same, are on the same subnet. For example, 192.168.0.5 is on the same subnet as 192.168.0.21
because the first 3 numbers (192.168.0) are the same, whereas 192.168.1.10 is not on the same subnet as
the 3
rd
number is different.
With a subnet mask of 255.255.255.0, there can be 256 devices on the same subnet, as the last number in
the IP address goes from 0 to 255. If you need more than 256 devices on the same subnet, you can change
the subnet mask to e.g. 255.255.254.0 which will give you an additional 256 devices, so a total of 512.
Explaining how the subnet mask is used is rather complicated, so we recommend that you use
255.255.255.0.
SUMMARY
IP address is the address of a device in a network.
Subnet mask is used to identify which devices are on the same network and which are outside the
network.
Default gateway is the IP address of the router, in case a connection is required outside the local
network.