31. The loss in signal power as light travels down the fiber is called

A. attenuation
B. propagation
C. scattering
D. interruption
E. None of the above

32. Operating system functions may include

A. input/output control
B. virtual storage
C. multiprogramming
D. All of the above
E. None of the above

33. Which layer of international standard organization’s OSI model is responsible for creating and recognizing frame boundaries?

A. physical layer
B. data link layer
C. transport layer
D. network layer
E. None of the above

34. Which of the following might be used by a company to satisfy its growing communications needs?

A. front-end processor
B. multiplexer
C. controller
D. concentrator
E. All of the above

35. Different computers are connected to a LAN by a cable and a/an

A. modem
B. interface card
C. special wires
D. telephone lines
E. None of the above