Question

Networking / Wide Area Networks

10. The purpose of a modem is to:

                  a. Convert an analog signal into a digital computer signal

b. Convert an analog signal into an analog voice signal

c. Convert a computer signal into a digital signal

d. None of the above

11. Which of the following would be an example of a Switched Virtual Circuit (SVC):

1. Using a modem to dial another modem using telephone company facilities
2. Using a dedicated T1 line between the office and an ISP
3. Using SONET facilities in a campus environment
4. None of the above

12. What is the purpose of a MUX?

1. Map low-speed input signals to a high-speed output signal
2. Map high-speed input signals to a low-speed output signal
3. Convert analog signals to digital signals
4. Convert digital signals to analog signals

18. Which of the following local loop technologies requires that the bandwidth be split between subscribers?

1. ADSL
2. Dialup Access
3. Cable Modems
4. T1

Answer 1

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(10) Option (d) - Nove of the above
Note: The purpose of a modem is to convert the digital signals into analog signals.

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(11) Option (a) - Using a modem to dial another modem using telephone company facilities.
Note: SVC is a type of circuit in which a temporary connection is made and after the data transmission is done the connection is terminated.

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(12) Option (a) - Map low-speed input signals to a high-speed output signal
Note: Mux stands for many to one. Multiple input signals are combined into one signal. Mux are mainly used to increase the amount of data that can be sent over the network.

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(18) Option (a) - ADSL
Note: ADSL requeries bandwidth to be split between subscribers.