Linux
In which tcp_wrappers file can you specify to allow all connections from all hosts?

None of these
/etc/hosts.allow
/etc/hosts.deny
/etc/hosts
/etc/tcp.conf

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Linux
The physical layer of a network

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

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