Chapter 17, 18 , 19, 20

Front 1

A color LCD screen is composed of a large number of tiny liquid crystal molecules, called ________, arranged in rows and columns between polarizing filters.

Back 1

sub-pixels

Front 2

Which LCD component sends power to backlights that need AC electricity?

Back 2

Inverter

Front 3

Which type of LCD monitor offers the best color?

Back 3

in-plane switching

Front 4

What characteristic of a monitor is calculated by multiplying the number of horizontal pixels and the number of vertical pixels?

Back 4

Resolution

Front 5

Which aspect ratio is used in widescreen monitors?

Back 5

16:9

Front 6

The secret to understanding the most common type of LCD panels is to understand the concept of the _____ of light.

Back 6

polarity

Front 7

What is another term for thin film transistor (TFT) technology?

Back 7

Active matrix

Front 8

What display type uses twisted nematic (TN) technology?

Back 8

TFT

Front 9

Early LCD backlights use ___ technology, popular for its low power use, even brightness, and long life.

Back 9

cold cathode fluorescent lamp

Front 10

Average LCD panels are around __, which most monitor authorities consider excellent brightness.

Back 10

300 nits

Front 11

One nit is equivalent to ___

Back 11

one candela/m^2

Front 12

Which term describes the difference between the darkest and lightest spots that the monitor can display?

Back 12

Contrast Ratio

Front 13

The propiertary ____ technology from Texas Instruments uses a single processor and an array of tiny mirrors to project a front-view image.

Back 13

Digital Light Processing (DLP)

Front 14

Like any other processer, a graphics processor needs ____

Back 14

RAM

Front 15

_____ is considered to be a good contrast ratio.

Back 15

450:1

Front 16

What term identifies how many colors can be displayed on a screen?

Back 16

Color Depth

Front 17

Higher-end monitors are capable of ___ color, meaning the monitor can display ___ color variations per channel.

Back 17

10-bit, 1024

Front 18

The vast majority of users will go with a(n) ____ panel and with a(n) ___ backlight.

Back 18

IPS, edge LCD

Front 19

A ____ is the amount of light given off by a light source from a certain angle that is perceived by the human eye.

Back 19

lumen

Front 20

____ screens use organic compounds between the glass layers that light up when given an electrical charge, which means they require no backlight at all.

Back 20

OLED

Front 21

Which DVI-I connector accepts either a DVi-D or a DVI-A connection?

Back 21

DVI-I

Front 22

Some projectors use a connection technology called ____ that enables long-range connectivity for uncompressed HD video and audio Cat 5a or Cat 6 network cables.

Back 22

HDBaseT

Front 23

What fast exapansion card standard was developed to replace PCI and AGP?

Back 23

PCIe

Front 24

A true 3-D object is composed of a group of points called ____

Back 24

vertices

Front 25

Every 3-D game stores a number of image files called ______

Back 25

Textures

Front 26

To create realistic movement, the 3-D world must refresh at least ____ times per second.

Back 26

24

Front 27

What do 3-D game programs use to send standard video commands to the device driver?

Back 27

APIs

Front 28

A pixel that is stuck on pure white is known as a(n) ____ pixel.

Back 28

lit

Front 29

If you hear a hissing sound coming from the LCD, which component is most likely to about to fall?

Back 29

Inverter

Front 30

Which LCD components are powered by a high-voltage electrical circuit that can give you a nasty shock?

Back 30

Inverters

Front 31

What should be used to clean LCD monitors?

Back 31

Antistatic monitor wipes.

Front 32

Network people call anything that one computer might share with another a ___

Back 32

Resource

Front 33

Data is moved from one PC to another in discrete chunks called __

Back 33

Frames

Front 34

A MAC address is a (n) ___ number.

Back 34

Binary

Front 35

How long is a MAC address?

Back 35

48 bits

Front 36

The ____ format is shorthand for representing strings of ones and zeros.

Back 36

hexadecimal

Front 37

How many binary characters are represented by one hexadecimal character?

Back 37

Four

Front 38

How do you represent the hexadecimal value A in binary?

Back 38

1010

Front 39

What hexadecimal value is represented by the binary value 1101?

Back 39

D

Front 40

___ are a part of the frame.

Back 40

Packets

Front 41

How are MAC addresses represented?

Back 41

Using 12 hexadecimal characters

Front 42

All network interfaces cards (NICs) have a (n)___ "burned" into them.

Back 42

MAC address

Front 43

Digital equipment, Intel, and Xerox invented the first network in the mid-1970s and created what eventually became __

Back 43

Ethernet

Front 44

What topology does Ethernet use?

Back 44

Star Bus

Front 45

What cable do Ethernet networks typically use?

Back 45

Unshielded twisted pair (UTP)

Front 46

Which device makes all computers share a given bandwidth?

Back 46

Hub

Front 47

What is the general cable distance limit of an Ethernet segment?

Back 47

100 meters

Front 48

What term refers to the maximum speed at which data can be transferred?

Back 48

Bandwidth

Front 49

Which orgranization established the UTP cable categories?

Back 49

ANSI/TIA

Front 50

Which Cat level supports 10-Gbps networks at 100-meter segments and provides shielding for individual wire pairs reducing crosstalk and noise problems?

Back 50

Cat 7

Front 51

What type of cabling is rarely seen in networking implementations?

Back 51

Shielded twisted pair

Front 52

The 10BaseT and 100BaseT standards require ___ pairs of wires.

Back 52

two

Front 53

1000BaseT needs all ___ pairs of wires in CAT 5e and higher cables.

Back 53

four

Front 54

Which connector connects your telephone to the telephone jack in the wall of your house?

Back 54

RJ-11

Front 55

Which connector is typically used in Ethernet?

Back 55

RJ-45

Front 56

RJ-45 is visibly much ___ than RJ-11

Back 56

wider

Front 57

Most fiber Ethernet networks use ___ multimode fiber optic cable.

Back 57

62.5/125

Front 58

Network technologies that use ___ light use single-mode fiber optic cabling.

Back 58

Laser

Front 59

There are close to ___ different Ethernet fiber optic cabling standards.

Back 59

100

Front 60

What term describes a group of networked computers that are typically located no more than a few hundred meters apart at most?

Back 60

LAN

Front 61

What device typically connects broadcast domains?

Back 61

Switch

Front 62

A LAN is almost always a ___

Back 62

broadcast domain

Front 63

How wide are all equipment racks?

Back 63

19 inches

Front 64

A device that goes into a 7-inch space is called a ___

Back 64

4U

Front 65

Typically, how long are patch cables?

Back 65

Two to five feet

Front 66

What is used to make a patch cable?

Back 66

Stranded Cables

Front 67

A good patch cable should include a ____

Back 67

boot

Front 68

What tool is used to verify that all the individual wires are properly connected and in the correct location in a cable?

Back 68

Cable tester

Front 69

You connect a workstation to the wall outlet with a ___

Back 69

Patch cable

Front 70

What component connects LANs into a WAN?

Back 70

Router

Front 71

What incoming frame type do routers automatically destroy by design?

Back 71

Broadcast

Front 72

What identifies a machine on a network?

Back 72

IP address

Front 73

How many bits are in an IPv4 address?

Back 73

32

Front 74

Under the class system, what was the default subnet mask of Class C addresses?

Back 74

255.255.255.0

Front 75

Under the class system, how many host IDs were available in a Class B network?

Back 75

65534 (2^16 - 2)

Front 76

Under the class system, what was the default subnet mask for Class A addresses?

Back 76

255.0.0.0

Front 77

How many host IDs does a /20 network support?

Back 77

4094 (2^12 - 2)

Front 78

The IP address on the LAN side of a router is called the ___

Back 78

default gateway

Front 79

What device connects a LAN's switch to the next network?

Back 79

Router

Front 80

What service translates easily remembered names such as google.com to IP addresses?

Back 80

DNS

Front 81

What is the address of the "LAN" side of a router called?

Back 81

Default Gateway

Front 82

What service automatically assigns IP addresses?

Back 82

DHCP

Front 83

What is the connectionless, unreliable data transfer protocol within the TCP/IP suite?

Back 83

UDP

Front 84

If you use the ___ switch, ping continuously sends ping packets until you stop it with the break command.

Back 84

-t

Front 85

What command displays a computer's network settings?

Back 85

ipconfig

Front 86

What should be entered at a command prompt to vie2 all of a uset's TCP/IP settings?

Back 86

ipconfig/all

Front 87

What is the Linux/macOS equivalent of ipconfig?

Back 87

ifconfig

Front 88

Which utility shows the route that a packet takes to get to its destination?

Back 88

TRACERT

Front 89

What is the Linux/macOS equivalent of tracert?

Back 89

traceroute

Front 90

How many bits are in an IPv6 address?

Back 90

128

Front 91

IPv4 addresses in the range 169.254.0.1 to 169.254.255.254 represent which feature?

Back 91

Automatic Private IP Addressing

Front 92

After entering IPCONFIG at a command prompt, you notice you are using an IP address in the 169.254.0.1 to 169.254.255.254 address range. What is most likely explanation for being assigned one of these addresses?

Back 92

The DHCP server is down

Front 93

In the IPv6 address 2001::3210:800:200C:CF:1234, how many groups of four zeros does the "::" notation represent?

Back 93

2

Front 94

The IPv6 address FE80::12C7:388B:CF:7114 represents what type of address?

Back 94

Link-local

Front 95

A(n) ___ is a network organization that centralizes user accounts, passwords, and access to resources.

Back 95

domain

Front 96

A Workgroup shares folders over the network. What does a Homegroup share?

Back 96

Libraries

Front 97

What instrument measures the impedance of a cable?

Back 97

Time-domain reflectometer

Front 98

Which device is used to perform a loopback test on a NIC?

Back 98

Loopback plug

Front 99

Which component emits a sound when it receives an electrical signal along the wire at a certain frequency?

Back 99

Tone probe

Front 100

What command would you use to map a share to a drive letter on a computer?

Back 100

net use

Front 101

What command allows you to quickly view a network?

Back 101

net

Front 102

What centrally connects wireless network nodes in the same way that a hub connects wired Ethernet PCs?

Back 102

WAP

Front 103

Which feature allows you to plug a single Ethernet cable into the WAP to provide both power and a network connection?

Back 103

PoE

Front 104

What method do wireless networks use to determine if other nodes are currently broadcasting?

Back 104

CSMA/CA

Front 105

What wireless network mode can quickly be used to share files and printers without a WAP?

Back 105

Ad hoc

Front 106

What is a wireless service area that has been extended by adding more WAPs?

Back 106

EBSS

Front 107

Where is the location for an omni-directional antenna in your home or office?

Back 107

Near the center

Front 108

What method enables you to limit access to your wireless network based on the physical, hard-wired address of the units' wireless NIC?

Back 108

MAC address filtering

Front 109

What is another name for the Service Set Identifier parameter?

Back 109

Network name

Front 110

Most WAPs support filtering, in which data packets that do not contain the appropriate address are rejected. What kind of address is filtered?

Back 110

MAC

Front 111

Which standard or protocol represents a security improvement in WPA2 over WEP and WPA?

Back 111

AES

Front 112

How many bits does WEP encryption use to scramble data packets?

Back 112

40

Front 113

Which standard or protocol provides a security improvement that WPA addresses over WEP?

Back 113

EAP

Front 114

Which protocol does WPA use to provide a new encryption key for every sent packet?

Back 114

TKIP

Front 115

Which standard has a security flaw that allows a hacker to guess an eight-digit code?

Back 115

WPS

Front 116

Which wireless networking standard supports data throughput of up to 11 Mbps?

Back 116

802.11b

Front 117

What is the theoretical maximum range of the 802.11a wireless networking standard?

Back 117

150 feet

Front 118

At what frequency range does the 802.11a-based wireless technology operate?

Back 118

5 GHz

Front 119

At what frequency range do the 802.11b- and 802.11g-based wireless technologies operate?

Back 119

2.4 Ghz

Front 120

What is the speed at which the 802.11g wireless technology transfers data?

Back 120

54 Mbps

Front 121

What 802.11n feature increases its range and speed?

Back 121

MIMO

Front 122

What frequencies does 802.11n use?

Back 122

2.4 and 5 Ghz

Front 123

What is the maximum capacity for data transfer between infrared devices?

Back 123

4 Mbps

Front 124

What wireless technology is often used to connect headsets to smartphones?

Back 124

Bluetooth

Front 125

What type of wireless network is very small and designed for "quick-and-dirty" jobs?

Back 125

PAN

Front 126

What is the maximum distance of a Class 3 Bluetooth device?

Back 126

1 meter

Front 127

What enables you to connect to the Internet through a network-aware smartphone, tablet, or other mobile device?

Back 127

Cellular wireless network

Front 128

What WPA/WPA2 encryption version uses a RADIUS server for secure authentication?

Back 128

WPA/WPA2-Enterprise

Front 129

What WAP settings should be adjusted in an environment with overlapping Wi-Fi signals?

Back 129

Channel and frequency

Front 130

What is the first step in choosing an optimal location for an access point?

Back 130

Site survey

Front 131

What is the standard straight-wire omnidirectional wireless antenna called?

Back 131

Dipole

Front 132

What is the gain from a typical WAP?

Back 132

2 dB

Front 133

What process needs to be undertaken to enable Bluetooth devices to create a secure connection?

Back 133

Pairing

Front 134

Where should you look for firmware updates on older WAPs?

Back 134

Manufacturer's Web site

Front 135

What should you open up to troubleshoot a suspected hardware problem?

Back 135

Windows Device Manager

Front 136

What should you check first when troubleshooting wireless connectivity issues?

Back 136

Wireless NIC link light