Computer Networking
Terminals are required for

realtime, timesharing, and distributed processing
realtime, distributed processing, and manager inquiry
None of these
realtime, batch processing, and timesharing
realtime, timesharing, and message switching

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

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

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