gives a list of strings specifying the current IP addresses associated with the computer on which Mathematica is being run.
- $MachineAddresses gives if no network address is defined, so that the computer is effectively "off line".
- $MachineAddresses will typically give a list with one element for each network adapter on your computer.
- If a network configuration is changed, the value of $MachineAddresses may change during the course of a single Mathematica session.
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