Author: AZ Pete Date: Subject: Help with Network Address Math
Calling all network gurus :)
My IP network address math is rather rusty (it's been a long time!!). I have need to calculate whether a given client
IP address is within a given network. Additionally, if there are a list of given networks, which one is the most
specific. I need the math formulas to calculate these figures for use within an application.
Examples:
Given the network: 192.168.1.0/24
Given IP address is: 192.168.1.100
What is the formula to determine if this client's IP address falls within the network's range.
Further example
Given these networks: 192.168.1.0/24 and 192.168.0.0/16
and the client IP of: 192.168.1.100
In this case the client's IP falls within both networks. What is the formula to determine which network is the more
specific one?
(text/plain)