6. Which of the following summation operation is performed on the bits to check an error-detecting code?

A. Codec
B. Coder-decoder
C. Checksum
D. Attenuation
E. None of the above

7. The standard suit of protocols used by the Internet, intranets, extranets, and some other networks.

A. TCP/IP
B. Protocol
C. Open Systems
D. Internetwork processor

8. Networks that follow the 802.5 standard appear to be in a star topology but are actually operating in what type of topology?

A. Linear bus
B. Modified star
C. Modified ring
D. Ring
E. Hybrid hub

9. A communications device that combines transmissions from several 1/ O devices into one line is a:

A. concentrator
B. modifier
C. multiplexer
D. full-duplex line
E. None of the above

10. The main difference between synchronous and asynchronous transmission is

A. the clocking is derived from the data in synchronous transmission
B. the clocking is mixed with the data in asynchronous transmission
C. the pulse height is different.
D. the bandwidth required is different
E. None of the above