The communication mode that supports data in both directions at the same time is

A. simplex

B. half-duplex

C. full-duplex

D. multiplex

E. None of the above

Answer: Option C

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Who invented the modem?

A. Wang Laboratories Ltd.

B. AT & T Information Systems, USA

C. Apple Computers Inc.

D. Digital Equipment Corpn.

E. None of the above