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A+ > Focus On > Flashcards

Focus On Flashcards

1
Q

RJ-45 Cable

A

connector used to terminate a copper twisted-pair ethernet cable

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2
Q

F Type connector

A

used with coaxial cables

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3
Q

DB-9

A

used to terminate an RS-232 serial cable
- connected to serial port or external modem

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4
Q

RJ-11 connector

A

used to terminate cables for phone lines

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5
Q

802.11a

A

5 GHz frequency to provide wireless networking at speeds up to 54 mbps

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6
Q

802.11b

A

2.4 GHz frequency with speeds up to 11 Mbps

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7
Q

802.11g

A

2.4 GHz with speeds up to 54 Mbps

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8
Q

802.11n

A

2.4 GHz frequency with speeds up to 108 Mbps or a 5 GHz frequency with speeds up to 600 Mbps
- supports MIMO
- The nominal data rate is 72 Mbps per stream or 150 Mbps per stream for a 40 MHz bonded channel.

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9
Q

802.11ac

A
  • WIFI 5
  • 5 GHz frequency with speeds up to 3.5 Gbps
  • supports up to 4 simultaneous clients
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10
Q

802.11ax

A

2.4 GHz and 5 GHz frequencies with speeds up to 9.6 Gbps
- MU-MIMO

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11
Q

AAAA record

A

associates your domain name with an IPv6 address

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12
Q

A record

A

associates domain name with IPv4 address

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13
Q

MX record

A

used for outgoing and incoming traffic

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14
Q

SOA

A

start of authority resource record indicates which DNS is best source of information for the specified domain

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15
Q

cable stripper

A

used to remove the plastic jacket from an ethernet cable to access its internal wires

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16
Q

cable tester

A

ensures a cable is properly created as a patch cable or a crossover cable

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17
Q

punchdown tool

A

used to connect an ethernet cable to the back of a patch panel or network wall jack

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18
Q

crimper

A

tool used to attach an RJ-45 plastic connector to an unshielded twisted pair or STP or patch cable

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19
Q

loopback plug

A

test a port

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20
Q

F12

A

enter boot menu/BIOS

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21
Q

F11

A

boot into recovery menu

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22
Q

F8

A

advanced boot options

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23
Q

port 137

A

NetBIOS

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24
Q

VDI

A

virtual desktop infrastructure
- using virtual machines as a method of provisioning workstations for corporate users

25
Q

ECC

A

error correcting code that has built-in error correction security and maintains integrity

26
Q

private IP addresses

A

10.x.x.x, 172.16.31.x.x and 192.168.x.x

27
Q

DHCP port

A

67

28
Q

HTTP port

A

80

29
Q

POP3 port

A

110

30
Q

emulator

A

emulate hardware without running code directly

31
Q

cat 6a

A

10 Gbps up to 100 m

32
Q

cat 6

A

10 Gbps up to 55m

33
Q

OLED

A

Led display that works without a backlight and emits own light
- thinner and lighter

34
Q

3 DC voltages

A

3.3, 5, 12

35
Q

QoS

A

using a network protocol to prioritize certain traffic types over others.

36
Q

port replicator

A

simple device used to extend range of ports on a desk

37
Q

what is phone flickering caused by

A

failing backlight

38
Q

jitter

A

time delay when sending packets over network connection

39
Q

embedded system

A

designed to perform specific function

40
Q

IPS display

A

good color quality, no viewing angle issues

41
Q

TN display

A
  • good with gamers because faster refresh rates
42
Q

printer control language

A

faster outputs of lower quality

43
Q

MicroATX motherboard dimensions

A

9.6 x 9.6

44
Q

inverter

A

acts as power supply for light source

45
Q

TCP/IP printer

A

will eliminate any compatibility issues with different OS

46
Q

technology used in unlicensed long range fixed wireless system

A

microwave

47
Q

technology used indoors to locate position

A

bluetooth

48
Q

wireless mesh network

A

wireless network topology where all nodes, including client stations, can provide forwarding and path discovery to improve coverage and throughput compared to using just fixed access points and extenders

49
Q

cloning

A

function that allows you to fully copy an existing virtual machine and its current configuration

50
Q

DNS port

A

53

51
Q

crossover cable

A

connect two similar devices to create a network

52
Q

redundant power supply

A

requires a compatible motherboard. This configuration is more common in server systems than on desktop PCs

53
Q

modular power supply

A

has power connectable cables that are detachable from the unit

54
Q

continuous POST beep code

A

system memory issues

55
Q

fuser unit

A

squeezes the paper between a hot roller and a pressure roller so that the toner melts onto the paper’s surface.

56
Q

transfer roller

A

applies a positive charge to the underside of the paper. This causes the toner on the drum to be attracted to the paper

57
Q

NVMe

A

packaged for installation to a PCIe slot as an expansion card or an M.2 slot.

58
Q

what does SMART measure as a performance indicator

A

IOPS

A+ (21 decks)

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