Linux
What command is not used to list the files chap01, chap02 and chap04?

ls chap[124]
ls - x chap0[124]
None of the listed here
ls chap*

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Linux
The physical layer of a network

defines the electrical characteristics of signals passed between the computer and communication devices
All of these
None of these
constructs packets of data and sends them across the network
controls error detection and correction

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