Review Questions

1. 

Define serial communication.

serial communication is the process of transmitting and processing data one bit at a time.

2. 

What is the difference between data that is transmitted serially and data that is transmitted in parallel?

data that is transmitted serially is transmitted one bit at a time; parallel data is transmitted 8 bits (one byte) at a time.

3. 

True or false: The refresh rate determines how many dots of the same color are drawn on the screen.

false. refresh rate signifies the number of times that the beam of electrons shot from the electron gun redraws the screen.

4. 

Which display adapter type is the best choice to display the maximum resolution and most colors?

super video graphics adapter (svga) will support the most colors and the highest resolution of all adapter types.

5. 

Name the four mouse interface types.

serial, bus, ps/2, usb

6. 

True or false: Digital signals represent constantly changing voltages.

false. digital data represents discrete voltage values. one value is represented at a given moment in time.

7. 

What is the difference between a modem and a cable modem?

a modem uses a standard telephone line to dial out to another modem or internet provider. a cable modem uses the catv network and maintains an active connection to the internet.

8. 

Why is performance on a DSL connection faster than with a modem?

traditional modems must convert digital signals to analog signals (modulate) to send data over phone lines. the maximum transmission speed of data in analog form over phone lines is 56kbps. dsl is all digital and therefore is not bound by the same physical restrictions as modems.

9. 

True or false: ISDN transmits data at a higher rate than a standard modem.

true

10. 

True or false: Motherboards are manufactured to accommodate only one bus specification.

false. motherboards are manufactured to support more than one bus type to accommodate various add-in components.

11. 

Why are printers often attached to a network?

printers are networked to provide many users access to a single print device and therefore save money by sharing the resource.

Answers

1. 

Serial communication is the process of transmitting and processing data one bit at a time.

2. 

Data that is transmitted serially is transmitted one bit at a time; parallel data is transmitted 8 bits (one byte) at a time.

3. 

False. Refresh rate signifies the number of times that the beam of electrons shot from the electron gun redraws the screen.

4. 

Super Video Graphics Adapter (SVGA) will support the most colors and the highest resolution of all adapter types.

5. 

Serial, bus, PS/2, USB

6. 

False. Digital data represents discrete voltage values. One value is represented at a given moment in time.

7. 

A modem uses a standard telephone line to dial out to another modem or Internet provider. A cable modem uses the CATV network and maintains an active connection to the Internet.

8. 

Traditional modems must convert digital signals to analog signals (modulate) to send data over phone lines. The maximum transmission speed of data in analog form over phone lines is 56Kbps. DSL is all digital and therefore is not bound by the same physical restrictions as modems.

9. 

True

10. 

False. Motherboards are manufactured to support more than one bus type to accommodate various add-in components.

11. 

Printers are networked to provide many users access to a single print device and therefore save money by sharing the resource.




MCSA. MCSE 2003 JumpStart. Computer and Network Basics
MCSA/MCSE 2003 JumpStart
ISBN: 078214277X
EAN: 2147483647
Year: 2003
Pages: 203
Authors: Lisa Donald

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