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When people refer to internet address they mean IP address. This is an address composed of 4 sections separated by periods. There is a associated network mask. The Network mask tells you which of the bits of the IP address refer to the Network, and so which bits refer to the device.

Example 192.168.100.0 with a mask of 255.255.255.0 means that only the 4th part is the device address whereas 192.168.100 is the network. This is a class C address which can have 254 devices.

It follows that if you don't know the network mask you can't say which part of the IP address is the network!

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12y ago

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