A subnet is basically a network divided or split up into there own individual networks. For example a typical Class C private network 192.168.0.0 you can have 192.168.1.0 and 192.168.2.0. Each would be a separate network.
A mask is how you determine the size of the network, and where the network starts, i.e. 10.X.X.0 the ending 0 will indicate it's a network.
a mask for example will let you know how many host and networks you can use with that network mask, for example. if you have a IP address of 10.4.8.24/30 then the /30 means that you have 30 network bits. Their are 32 bits in a ip address or network mask. 11111111.11111111.11111111.11111100 or 255.255.255.252 Notice how there a 2 0's at the end. These are your host bits.
To figure out how many hosts you can have connected per subnetwork you would use the formula 2 to the power of X. In this example it would be 2 to the power of 2 - 2 . Which equals 2. In this example you would have a mask of 255.255.255.252. You can figure out the mask by using binary.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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