11. Who originally designed TCP/IP?

A. The Department of Defense
B. Novell
C. IBM
D. Xerox

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12. The systematic access of small computers in a distributed data processing system is referred to as:

A. dialed service
B. multiplexing
C. polling
D. conversational mode
E. None of the above

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13. The process of converting analog signals into digital signals so they can be processed by a receiving computer is referred to as:

A. modulation
B. demodulation
C. synchronizing
D. synchronizing
E. None of the above

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14. An example of digital, rather than analog, communication is

A. DDD
B. DDS
C. WATS
D. DDT
E. None of the above

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15. How many OSI layers are covered in the X.25 standard?

A. two
B. three
C. seven
D. six
E. None of the above

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