Linux
In OSI network architecture, the routing is performed by

None of these
session layer
transport layer
network layer
data link layer

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Linux
NIS

was formerly known as yellow pages
is a simple directory service whose main purpose is to allow remote authentication of systems on local network systems
allows configuration-such as password and group files
is Network Information Service

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Linux
The physical layer of a network

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

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