Computer Networking
Synchronous protocols

are generally used by personal computers
None of these
allow faster transmission than asynchronous protocols do
are more reliable
transmit characters one at a time

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

None of these
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
a set of physical layer standards developed by EIA and intended to replace RS-232-
the ratio of the number of data units in error to the total number of data units
a check bit appended to an array of binary digits to make the sum of the all the binary digits

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