Citation :
There are a few important differences between mounted disks and packet-delivery interfaces. To begin with, a disk exists as a special file in the /dev directory, whereas a network interface has no such entry point. The normal file operations (read, write, and so on) do not make sense when applied to network interfaces, so
it is not possible to apply the Unix ?everything is a file? approach to them. Thus, network interfaces exist in their own namespace and export a different set of operations.
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