Computer Networking
Contention is

a continuous frequency capable of being modulated or impressed with a second signal
None of these
One or more conductors that serve as a common connection for a related group of devices
the condition when 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

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Computer Networking
What does a switch do when a frame is received on an interface and the destination hardware address is unknown or not in the filter table?

Forwards the switch to the first available link
Floods the network with the frame looking for the device
Drops the frame
Sends back a message to the originating station asking for a name resolution

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