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A+ Certification > Computer Computents > Flashcards

Computer Computents Flashcards

1
Q

Specifications of a Serial cable

A

max 50 ft, 20kbps

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2
Q

specifications of a parallel cable

A

max 15ft, IEEE 1284 compliant cables; bidirectional communication 3 types: Compatibility mode/ standard (SPP) - 360,360bps ( unidirectional ) Enhanced Parallel Port (EPP) - 2Mbps - (bidirectional ) Extended Capability Port (ECP) - 2.5Mbps ( bidirectional )

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3
Q

specifications of a USB cable

A

max 5 hubs and 127 devices 3 different speeds

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4
Q

Specifications of Firewire IEEE 1394

A

4.5m cable limit, max 16 daisy chain devices with power repeaters and hubs no than 63 devives per bridgeable bus

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5
Q

USB 1.1 specs

A

1.5 mbps - 12mbps max

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6
Q

USB 2.0

A

480 mbps max speed

up to 127 devices on one usb port

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7
Q

USB 3.0

A

5 Gpbs max speed

up to 127 devices on one usb port

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8
Q

Firewire 400 ( IEEE 1394a)

A

100, 200 or 400 mbps half duplex

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9
Q

Firewire 800 ( IEEE 1394b)

A

800 Mbps full duplex

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10
Q

CD capacity

A

700mb max

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11
Q

DVD capacity

A

4.7Gb data max

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12
Q

DVD Double layer (DL)

A

9.4Gb max

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13
Q

Blue- ray dvd

A

25gb per layer 4.5mbps

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14
Q

IPCONFIG /all Command

A

gives the the ipaddress, mac address and

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15
Q

DIR command

A

Show the directory you are in

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16
Q

MD Command

A

Makes a directory

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17
Q

RD Command

A

Removes the directory

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18
Q

CD Command

A

Changes directory

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19
Q

1024 bytes

A

1 kilobyte

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20
Q

1 megabyte

A

1024 kilobytes

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21
Q

1024 megabytes

A

1 gigabyte

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22
Q

1024 gigabytes

A

1 Terabyte

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23
Q

PGA ( pin grid Array )

A

A packaging of IC( integrated circuits) with pins arranged in a regular array on the underside of the package

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24
Q

LGA ( Land Grid Array )

A

A surface-mount packaging for ICs with pins on the socket rather than on the integrated circuit

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25
Q

Passive heat sink

A

Uses surface area, not a fan, for cooling

26
Q

Active heat sink

A

uses a variety of micro-technologies to air-cool components

27
Q

Heat Pipes

A

Uses fluid -filled tubes built into cooling fins.

28
Q

Water Pump

A

For computer to hot for fins and heat to cool

29
Q

Peltier Coolers

A

An electronic device that gets colder when a voltage is applied to it

30
Q

Phase-change cooling

A

uses a vapor-compression unit to cool components, its like an AC

31
Q

LGA 1366

A

work with ddr3 memory

32
Q

lga771/ socket J

A

used on high-end workstation and low end servers

33
Q

lga775/socket t

A

most popular intel socket with with ddr3 and ddr2 memory

34
Q

socket 478

A

used in dense micro PGA

35
Q

socket 423

A

No longer sold and has a 39 x 39 SPGA grid

36
Q

USB Type A Connector and port

A

Flat and rectangular

37
Q

USB type b

A

Square with a round bulge or square protruision on top.

38
Q

FireWire 4 pin

A

Used to connect external devices to the computer and consumer-electronic consoles

39
Q

FireWire 6 pin

A

Used for high speed communications

40
Q

Compnents of a display panel case

A

Flurescent Lamp

LED Strips

Inverters

Wi-fi Antennas

41
Q

Thicknet Cables

A

carry up to 500 meters

are used for ethenet network backbones rather than for the network nodes

They are RG-8 cables

42
Q

Thinnet Cable

A

Support network segments up to 185 meters long

When wired with rg58/u coaxial cable, limited functionality by attenuatin in the cable

more flexible than other coaxial cables

max of 30 node connections

43
Q

CAT 1

A

Up to 1 Mbps

44
Q

CAT 2

A

4 Mbps 4MHZ

45
Q

CAT 4

A

16 Mbps 20 MHZ

46
Q

CAT 7

A

10 Gbps 600 MHZ

47
Q

RJ 11

A

phone cable -

48
Q

RJ-45

A

Ethernet Cable

49
Q

ST Connector

A

Straight Tip - most popular fibre optic connection

50
Q

SC Standard connector

A

2.5mm2.5 mm ferrule that snaps into a network device with a simple push/pull motion.

51
Q

LC Local Connector

A

Are half the size of SC connectors, with a 1.25 mm snap-in ferrule.

52
Q

BNC Connector

A
53
Q

FTP ( File Transfer Protocol)

A

Enable local host to upload and download files and to request directory listings from a remote server

54
Q

SFTP ( Secure File Transfer Protocol)

A

Enables secure, encrypted file transfers using the Secure Shell (SSH) protocol. SSH encrypts all passwords and data, and uses a digital certificate for authentication.

55
Q

Electrophotographic

A

A printing process that uses electrostatic charges, toner and laser light to print high-quality images

56
Q

Apect Ratio

A

The ratio between the horizontal and vertical size of a display device

57
Q

CMOS

A

An area of memory that stores BIOS confiuration information

58
Q

Demodulation

A

The process by which a modem removes the carrier analong wave from the digital signal it carries

59
Q

RAID

A

a set of standards for extending disk-drive life, preventing data loss, and enabling uniterrupted access to data.

60
Q

HUB

A

a device that connects network devices and segment of a LAN

61
Q

RISER Card

A

a circuit board that connect to a motherboard to provide additional expansion slots or sockets

A+ Certification (14 decks)

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