Computer Networking
How many digits of the Network User Address are known as the DNIC (Data Network Identification Code)?

first seven
None of these
first three
first five
first four

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Computer Networking
Contention is

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

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