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CompTIA A+ Certification Prep 3: Network/Security > Lesson 3 - Chapter 3: Ethernet Cable > Flashcards

Lesson 3 - Chapter 3: Ethernet Cable Flashcards

1
Q

What is the most common cable type for Ethernet and its sub types?

A

Twisted pair (2 sub-types: unshielded and shielded)

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2
Q

What’s the most common cable in use today and the one used for 10/100/1000/10GBaseT?

A

Unshielded Twisted Pair

(remember 10GBaseT = T = Twisted, UTP)

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3
Q

Twisted pair cabling consists of what gauge wires?

A

22 - 26 gauge wires twisted together into color-coded pairs

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4
Q

What does bandwidth mean?

A

the maximum speed at which data can be transferred

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5
Q

What UTP cable category is most used today? What are their Max speeds? (2)

A

Cat 6 or Cat 6a cables

Cat 6 = 1000 Mbps @ 100 meter segments, 10 Gbps @ 55 meter segments
Cat 6a = 10 Gbps @ 100 meter segments

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6
Q

What is crosstalk?

A

Crosstalk refers to the electromagnetic interference (EMI) that occurs when data travels through 2 adjacent cables

(affects the adjacent cable’s data)

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7
Q

What is STP?

A

Shielded twisted pairs of wires surrounded by an outer shield that protects from EMI

(rarely used)

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8
Q

What’s the difference between Cat 7 UTP and STP?

A

Cat 7 UTP = the shielding is around individual wire strands inside cable
STP = the shielding is around the outside of the bundle of wires inside the cable (protects from outside EMI sources like fluorescent lighting)

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9
Q

What’s the cable called that is designed to be buried outside? What type of cable is it?

A
  1. Direct burial cable
  2. A type of STP
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10
Q

What is a plenum space?

A

the space where most network cables go (above the ceiling, under the floors, and in the walls)

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11
Q

What is the protective sheathing for networking cables called?

A

the jacket

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12
Q

What are standard network cables made out of?

A

A plastic called PVC (polyvinyl chloride) that produces toxic fumes when burned

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13
Q

What is the type of cable that is fire-retardent that’s ideal to use in plenum spaces?

A

plenum-grade cable (has fire-retardent jacket)

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14
Q

What type of connector is used for Ethernet unshielded twisted-pair cable standard?

A

RJ-45

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15
Q

What are the 3 types of RJ connectors used for networking?

A
  1. RJ-11
  2. RJ-14
  3. RJ-45
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16
Q

What’s the difference between RJ-11 and RJ-14 connectors?

A

RJ-11 - single phone line, single twisted pair, 2 contact points
RJ-14 - 2 phone lines, 2 twisted pairs, 4 contact points

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17
Q

An RJ-45 connector has how many pairs of wires and contact points (wires)?

A

4 twisted pairs, 8 contact points

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18
Q

Can you use any RJ-45 connector on any Cat cable?

A

No, RJ-45’s aren’t interchangeable

(can’t use Cat 5e RJ-45 connector with a Cat 6 cable)

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19
Q

The attachment points for wires in an RJ connector are numbered from which direction?

A

from right to left (connector facing you)

20
Q

What are the 2 standards for connecting an RJ-45 connector to a UTP cable?

A
  1. T568A
  2. T568B
21
Q

Each twisted pair of wires in UTP have what standardized colors? (2)

A

a solid color wire and a white wire striped with that same solid color (candy cane)

22
Q

How can you hook 2 computers directly together?

A

Use a special UTP cable called a crossover cable

23
Q

What does a crossover cable look like?

A

its a standard UTP cable with one RJ-45 end using the T568A standard and the other RJ-45 end using the T568B standard so the signal reverses between them to send/receive.

(acts like a quick hub/switch)

24
Q

How do fiber optic cables transmit data? (what type?) [2]

A

they use light (either LED or lasers)

25
Q

Do fiber optic cables have the same issues as copper twisted pair?

A

No, they are immune to lightning, short circuits, EMI, etc

26
Q

How far can fiber optic signals travel ideally?

A

2000 meters+

(compared to 100 meters on UTP)

27
Q

Most fiber optic networks use what multimode cable?

A

62.5/125 multimode fiber optic cable

28
Q

What are the 3 most common connectors used in fiber optic networks?

A
  1. ST (round)
  2. SC (square)
  3. LC (2 small squares)
29
Q

fiber optic cables are half-duplex. What does that mean?

A

the data flows in one direction (so fiber optics need 2 cables to be bidirectional)

30
Q

What is multi-mode fiber optic cabling?

A

it means multiple light signals are being transmitted at the same time using a different reflection angle within the core of the cable

31
Q

Multi-mode fiber optic cabling is used with what type of light only?

A

LED

32
Q

What’s a downside to multi-mode fiber optic cables?

A

the multiple reflection angles disperse over long distances and are only good for short distances

33
Q

Network technologies that use single-mode fiber optic cabling use what kind of light?

A

laser light

(blazing high transfer rates over long distances, very rare to see in practice)

34
Q

If you want to use fiber optic cabling, what 2 things do you need?

A
  1. fiber optic network card
  2. fiber optic switch
35
Q

What distance do multimode cables top out at?

A

~600 meters

36
Q

What’s the transmission speed difference between single-mode and multi-mode fiber optic cables?

A

multi-mode = 10-10,000 Mbps
single-mode = 100 Tbps over 100 miles (Terabits)

37
Q

What cable did early versions of Ethernet run on?

A

coaxial cable

38
Q

Where would you find coaxial cables today?

A

cable modems and satellite connections

39
Q

How are coaxial cables rated?

A

rated using an RG number that measures its amount of impedence

40
Q

What is impedance?

A

the resistance to the flow of an alternating current of electrical signal through a cable

41
Q

What are the 2 types of connectors a coaxial cable uses?

A
  1. BNC connector (uncommon, looks like a water line)
  2. F-type connector (cable modems, most TVs)
42
Q

What is the speed of a Cat 5 cable?

A

100 Mbps up to 100 meter segments

43
Q

What is the speed of a Cat 5e cable?

A

1000 Mbps up to 100 meter segments

44
Q

What is the speed of a Cat 6 cable?

A

1000 Mbps up to 100 meter segments, 10 Gbps networks up to 55 meter segments

45
Q

What is the speed of a Cat 6a cable?

A

10 Gbps networks up to 100 meter segments

CompTIA A+ Certification Prep 3: Network/Security (45 decks)

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