Computer Networking
What is a stub network?

A network that has only one entry and exit point.
A network with more than one exit point.
A network with only one entry and no exit point.
A network with more than one exit and entry point.

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Computer Networking
RS-449/442-A/423-A is

None of these
a check bit appended to an array of binary digits to make the sum of the all the binary digits
a set of physical layer standards developed by EIA and intended to replace RS-232-
a code in which each expression conforms to specific rules of construction, so that if certain errors occur in an expression the resulting expression will not conform to the rules of construction and
the ratio of the number of data units in error to the total number of data units

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Computer Networking
Communication network is

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

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