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CompTIA A+ Core 1 > 3.1 Cable Types And Connectors > Flashcards

3.1 Cable Types And Connectors Flashcards

1
Q

Twisted Copper Cabling

A
  • pairs consist of two wires w/ equal and opposite signals
  • cables are twisted to reduce cross-talk and EMI between
  • different pairs in the same cable have different twist rates
  • max length of 100 meters
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2
Q

Twisted Copper Cable Types

A

Cat5, Cat5e, Cat6, Cat6e
- different cable category for different ethernet standards
- typically use RJ45, sometimes RJ11
- 4 twisted pairs
- Cat5e and higher will support PoE on all voltages

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3
Q

Category 5

A

1000BASE-T
100 meters
100 Mbit/s

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4
Q

Category 5e (enhanced)

A

1000BASE-T
100 meters
1 Gbit/s

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5
Q

Category 6

A

10GBASE-T
10 Gbit/s up to 55 meters unshielded
1 Gbit/s up to 100 meters shielded

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6
Q

Category 6a (augmented)

A

10GBASE-T
100 meters
10Gbit/s

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7
Q

Coaxial Cable

A
  • two or more forms share a common axis
  • copper cabling
  • RG-6 coaxial used in television/digital cable and internet over broadband cable
  • shielded
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8
Q

Plenum-rated Cable

A

Fire-rated cable jacket: FEP or PVC
Less flexible

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9
Q

UTP

A

Unshielded Twisted Pair
- most common twisted pair cabling
- low cost, easy installation
- ethernet and telephone systems

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10
Q

STP

A

Shielded Twisted Pair
- additional shielding protects against interference
- shields each pair and/or whole cable
- requires cable to be grounded
- ethernet and telephone systems

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11
Q

Direct Burial STP

A
  • cable in the ground
  • waterproof
  • conduit not always needed
  • shielded twisted pair
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12
Q

Fiber Optic Cabling

A
  • transmission by light
  • signal is slow to degrade
  • long distance
  • no radio signal = no EMI or RFI, difficult to tap
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13
Q

Multi-mode vs Single-mode Fiber

A

Multi-mode:
- short range
- relatively inexpensive (ex. LED)

Single-mode:
- long range
- expensive, commonly uses lasers

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14
Q

568A and 568B

A

Cabling Standards
- guideline on how cables should be installed
- ex. the colors used for each pin

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15
Q

USB 1.1

A

Speeds up to 12 Mbits/s, 5 meters

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16
Q

USB 2.0

A

480 Mbits/s
5 meters

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17
Q

USB 3.0

A

5 Gbits/s
Max length not specified
3 meter length cable is common

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18
Q

USB 1.1/2.0 Connectors

A

Standard-A Plug
Standard-B Plug
Mini-B Plug
Micro-B Plug

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19
Q

USB 3.0 Connectors

A

Standard-A Plug (similar shape to 2.0)
Standard-B Plug
Micro-B Plug

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20
Q

USB 3.2

A
  • doubled bandwidth with USB-C

USB 3.2 Gen 1x2
- 10 Gbps using two Gen 1

UBS 3.2 Gen 2x2
- SuperSpeed USB 20 Gbps using two Gen 2 lanes

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21
Q

Thunderbolt

A
  • data and power on the same cable
  • based on Mini DisplayPort standard
  • max 3 meters for copper
  • max 60 meters for fiber
  • daisy chain up to 6 devices
22
Q

Serial Console Cables

A
  • asynchronous transmission
  • commonly used for RS-232
  • ex. DB-9 and DB-25
23
Q

VGA

A

Video Graphics Array
- DB-15 connector
- three row, 15 pin
- blue
- video only, no audio
- analog
- image degrades after 5-10 meters

24
Q

HDMI

A

High-Definition Multimedia Interface
- video and audio signal
- digital
- 20 meters before signal loss
- 19 pin(Type A) connector

25
Q

DisplayPort

A
  • digital info sent in packetized form
  • video and audio signal
  • compatible w/ HDMI and DVI
26
Q

DVI

A

Digital Visual Interface
- single link video: 3.7 Gbps
- dual link video: 7.4 GBPs
- no audio

DVI-A for analog signals
DVI-D for digital signals
DVI-I for digital and analog

27
Q

SATA

A

Serial Advanced Technology Attachment
- connection exclusively inside the computer for storage devices
- one power cable to the PSU and one data cable to the motherboard per storage device
- 15 pin power connector
- L-shaped 7 pin data connector

28
Q

SATA cable speed

A

1.0: 1.5 Gbit/s, 1 meter
2.0: 3 Gbit/s, 1 meter
3.0: 6 Gbit/s, 1 meter
3.2: 16 Gbit/s, 1 meter

29
Q

eSATA

A
  • external storage device connection
  • SATA standard
  • 2~ meters
30
Q

SCSI

A

Small Computer Systems Interface
- connects to storage devices, scanners, printers, etc.
- daisy-chain up to 16 devices
- different standards with different interfaces and cables
- parallel SCSI requires termination

31
Q

SCSI ID and LUN

A
  • every SCSI device on a single bus is assigned its own ID number
  • LUN(logical unit number) are defined within each SCSI ID
32
Q

Serial Attached SCSI (SAS)

A
  • serial connection instead of parallel
  • increased throughput

point-to-point connection:
- no more daisy chains
- no termination required

33
Q

PATA or IDE

A

Parallel ATA
- originally called Integrated Drive Electronics (IDE)
- originally 40 wire ribbon cable with 40 pins
- 80 wire ribbon cable was used as speeds increased
-supports two devices on a single PATA connection

34
Q

Adapters and Converters

A
  • convert between different connectors that are electrically compatible
  • convert from one format to another
35
Q

RJ 11 connector

A

6 position, 2 conductor
Telephone or DSL connection

36
Q

RJ45

A

8 position, 8 conductor
Most commonly used for ethernet
Modular connector

37
Q

F-connector

A

Cable TV
Cable modem
DOCSIS
RG-59/RG-6 cabling

38
Q

Punchdown Block

A

Wire-to-wire patch panel
Wires are punched into the block
110 block: newer, used in computer networks
66 block: older, used in analog telephone systems

39
Q

USB-C

A

24 pin double sided
Used for both hosts and devices

40
Q

Molex Connector

A
  • 4 pin peripheral power connector
  • +12 V and +5 V
  • provides power from power supply to internal devices (storage devices, optical drives, fans, etc).
41
Q

Lightning

A
  • Apple proprietary
  • higher power output compared to micro usb
  • getting replaced by USB-C
42
Q

Db-9

A
  • D-sub
  • commonly used for RS-232
  • 9 pin
43
Q

LC

A

Local Connector
- Used for fiber
- small form factor
- high efficiency
- most common nowadays

44
Q

ST Connector

A

Straight Tip
- Used for fiber
- common for corporate networks and military applications

45
Q

SC

A

Subscriber Connector
- aka square connector
- used for fiber
- suited for datacoms and telecom applications

46
Q

Mini-USB and Micro-USB

A
  • used for mobile devices, peripherals, and storage devices
  • data transfer
  • mainly used to charge portable electronics
  • being replaced by USB-C
47
Q

Straight- through vs crossover ethernet cables

A

Straight-through:
- connects devices that operate at different layers of the network model
- ex. Computer and switch

Crossover:
- connects devices operating at the same level of the network
- ex. Two switches

48
Q

Patch Cable

A

Basically a short ethernet cable

49
Q

Thunderbolt 1

A
  • 10 Gbit/s x 2 channels
  • 20 Gbit/s total throughput
  • MDP connector
50
Q

Thunderbolt 2

A
  • 20 Gbit/s aggregated channels
  • MDP connector
51
Q

Thunderbolt 3

A
  • 40 Gbit/s aggregated throughput
  • USB-C connection

CompTIA A+ Core 1 (28 decks)

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