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A default subnet mask gives you classful addressing on octet boundaries. A non-default subnet mask implies that you are subnetting a larger network into several smaller ones.
255.0.0.0The default subnet mask of a class A network is 255.0.0.0
That is your subnet mask.
That address belongs to RoadRunner internet who is likely to be using complex network scopes, or even single addresses. Because of that the subnet mask is impossible to predict. IF (and I'm sure you're not) you were to address the entire Class B subnet, the available addresses would be 24.172.0.0 - 24.172.255.255 and THAT subnet would be 255.255.0.0
255.255.255.0
The Method used for changing your subnet mask would be based on what platform your using and its installed operating system.
It depends on whether you are using a default subnet mask or you are subnetting the class B network. A default subnet mask would be 255.255.0.0, but if you are subnetting the last 2 octets in the subnet mask could be anything (up to 255 per octet).
A default subnet mask gives you classful addressing on octet boundaries. A non-default subnet mask implies that you are subnetting a larger network into several smaller ones.
It does not require a subnet mask.
Subnet mask defines our network bit . If we are using a single network then all computers should have same subnet mask as well as the ip address, that belongs to the same network id.
If this is a default subnet mask, then it would be a class C subnet mask. If you are subnetting a network and this is not the default subnet mask, then it could be either a class A or class B.
The default subnet mask has a standard size. The custom subnet mask allows you to make subnets that are smaller or larger than the default.
c
255.255.240.0 126.0.160.0
2 given subnets
255.255.255.0
255.255.255.0