Computer Networking
Contention is

the condition when two or more stations 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 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

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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

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

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