Computer Networking
Which of the following is a wrong example of network layer?

X.25 Packet Level Protocol (PLP)-ISO
Internet Protocol (IP) - ARPANET
Source routing and domain naming-USENet
X.25 level 2-ISO

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Computer Networking
Communication network is

the condition with two or more stations attempt to use the same channel at the same time
a collection of interconnected functional units that provides a data communications service among stations attached to the network
a continuous frequency capable of being modulated or impressed with a second signal
one or more conductors that serve as a common connection for a related group of devices
None of these

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Computer Networking
The application layer of a network

consists of software being run on the computer connected to the network
None of these
establishes, maintains, and terminates virtual circuits
All of these
defines the user's port into the network

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