Computer Networking
Carrier is

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

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Computer Networking
TCP is:

Connectionless and unreliable
Operates at the Data Link layer
Connection orientated and unreliable
None of these
Connection orientated and reliable

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Computer Networking
The fundamental requirements of private-to-public network interconnection methods which need to be provided in gateways is/are

None of these
adequate cost control mechanisms for administration of the private networks
A and B both
to assign address to private network DTEs
universal accessibility for private network Data Terminal Equipment (DTE)

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