Chapter 13 Study Guide

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Oct 26, 2013 (3 years and 9 months ago)

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Chapter 13 Study Guide

1

Cellular

is a portable connection provides the user with the possibility of high
-
speed Internet connectivity.



2.

Infrared

is a wireless

technology that has a range limited to 3 feet (1 m) and cannot penetrate ceilings and walls. The infrared
technology is a low
-
power, short
-
range technology that uses LEDs to transmit data and use photodiodes to receive data.


3.

Some keys on a laptop work i
ntermittently. They sometimes type the letter and sometimes do not. What should a technician do
to fix this problem?
Clean the keyboard.


4.


A student unpacks a new laptop, attaches the AC adapter, and powers it up. However, the laptop power LED is off. What
is
the probable cause of the problem?

The AC adapter is not securely connected.




5.

A

technician is working on a laptop that has excessive hard drive activity. Which two actions can the technician take to resolv
e
the problem?

a. Delete files and programs

on the hard drive.

b. Replace the laptop hard drive.


6.

W
hat are two steps a technician should t
ake before repairing a laptop?

a. Backup all data stored on the laptop.

b. Check the warranty to see if repairs must be done by an authorized service center.


7.

A

laptop that worked fine previously now fails to emit sound. A technician finds that the sound is still enabled through the
control panel. What could be causing the problem?

The sound could have been disabled through a slide switch commonly located below t
he sound port.


8.

802.11n

is a
wireless technology offers a maximum data rate of 540 Mbps?


9.

Which two sources can be used to determine the amount of currently installed RAM on a computer?



a.
POST “ Power on self test”


b. System Properties dialog box


10.

The design department recently doubled the RAM capacity in all of the laptops. After the upgrade, the laptop users reported
experiencing improved performance. Which operational benefit have the users noticed after the RAM increase?

The hard disk swap file
is read less frequently.


11.

A laptop that previously worked now fails to boot. The cursor fails to appear on the screen. When a bootable DVD is inserted,

the system still fails to boot even though it is set to boot from CD/DVD. The fan turns, so power is app
lied and the power light
is on. The technician installs the hard drive in another laptop and it works there. What is the probable cause of the problem
?

The CD/DVD drive has failed.


12.

Ni
-
Cad and NiMh are

two types of batteries should be completely discharged

and then fully recharg
ed to remove the charge
memory.


13.

Solid state drives reduce power usage
is the
advantage
when

being used in a laptop
.


14.

A laptop fails to start after a new hard drive has been installed. What are two possible causes of this problem?

a.
The hard drive was not connected properly.

b.
The BIOS does not recognize the new hard drive.


15.

Scatter

is a

type of infrared network bounces th
e signal off ceilings and walls.


16.

USB and Fire wire are

two

types of ports can be used to attach an external hard drive to a laptop computer
.



17.

Warless protocols :

802.11

P
rotocol

Data rate


R
ange

a

54
Mbps

120
m

b

11

Mbps

140
m

g

54

Mbps

140
m

n

150

Mbps

250
m


18.

Manufacturers often offer devices in two versions, one with all the necessary manuals and drivers and one without. Which two
names are given to these versions?


OEM

and R
etail


19.

Which three standard procedures must always be included in a preventive maintenance schedule?



a
physical cleaning


b
hard drive maintenance


c
software updates


20.

The accounting department has received a new laser printer. According to the printer t
echnical specification, the printer
complies with the Bluetooth Class 2 specification. What is the maximum distance that any device could be expected to
successfully send print jobs?

33 ft (10 m)


21.

Why should care be taken when charging and handling a lapto
p battery?

Laptop batteries can explode if mishandled or improperly charged.


22.

W
hich two methods can be used to provide security for a Blu
etooth connection?


a
PIN authentication

b s
ervice Set Identifier (SSID)


23.

Which type of encryption key should be
enabled on WPA
-
compliant devices?

128
-
bit


24.

Which three laptop components should be cleaned during routine maintenance?



a.
exterior case



b
cooling vents


c
keyboard

25.

A laptop will only work on AC power. What should be done to fix the problem?



Replace the battery.


26.

Security is a major concern for wireless networks. Anyone within the coverage area of a wireless router can
potentially gain access to the network. These precautions should be taken for security purposes:



Never send login or password

information using clear, unencrypted text.



Use a VPN connection when possible.



Enable security on home networks.



Use Wi
-
Fi Protected Access (WPA) security

27. List Five Wireless Technologies

a. Bluetooth. b. Infrared. c. Celluar WAN d.WiFi e.Satellite