Computer Networking
Contention 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 stations attempt to use the same channel at the same time
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

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Computer Networking
Which of the following characteristic(s) is/are suited to the PSS applications?

Multiple remote host or applications accessed by a single local access circuit terminal and circuit
widely dispersed terminals and access to international packets switched services
All of these
bursty traffic and low communications intensity
None of these

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Computer Networking
Which of the following is true when describing a unicast address?

These addresses are meant for nonrouting purposes, but they are almost globally unique so it is unlikely they will have an address overlap.
These are your typical publicly routable addresses, just like a regular publicly routable address in IPv4.
Packets addressed to a unicast address are delivered to a single interface.
These are like private addresses in IPv4 in that they are not meant to be routed.

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