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MyOwnNet+Study > Chapter 2 Cabling & Topo. > Flashcards

Chapter 2 Cabling & Topo. Flashcards

1
Q

What is network topology?

A

The way that pieces of hardware connect to one another, via wired or wireless connection

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2
Q

What brings a bus network down if both ends aren’t terminated?

A

Reflection

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3
Q

What is a signaling/logical topology?

A

How signals travel electronically/the shape of signal flow inside the star box

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4
Q

What was the most successful star-ring?

A

IBM’s “Token Ring”

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5
Q

What are the two distinct types of cable?

A

Copper & Fiber-Optic

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6
Q

What are copper cables also called?

A

Coax

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7
Q

What are the 4 layers of copper/coax cables?

A

1) Central Copper Wire
2) Insulation
3) Braided Metal Shield
4) Jacket

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8
Q

What cable did early bus networks use?

A

Coax

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9
Q

What is coax primarily used for today?

A

Connect cable modem to ISP

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10
Q

What movement do coax connectors do to connect?

A

Screw-On

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11
Q

What connectors do coax cables typically use?

A

F-Type “Screw On”

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12
Q

What are the two coaxial cable types?

A

1) RJ-59: for cable television
2) RG-6: predominantly used today

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13
Q

What is RJ-59 coaxial cable used for and what is its Ohm rating?

A

Cable Television; 75 Ohms

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14
Q

What is RG-6 cable used for and what is its Ohm rating?

A

Typical coax used today by ISPs etc.; 75 Ohms

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15
Q

All coax cables have a ___ rating

A

Radio Guide (RG)

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16
Q

What is the Ohm rating?

A

IMPEDANCE: Defines how much a cable resists the flow of electricity, how long it takes to get a full charge, and capacitance

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17
Q

What cables do barrel connectors connect?

A

Two Coax Cables

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18
Q

What is twinaxial cable?

A

A type of coax; 2 central copper conductors wrapped around a single shield

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19
Q

When twinaxial is used to substitute short fiber connections inside a rack, what is it called?

A

DAC (Direct Attached Cable)

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20
Q

What interference does twisted pair reduce?

A

Crosstalk

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21
Q

Define Category (CAT) Ratings; What measurement is used?

A

MHz ratings which reflect the maximum frequency a cable can handle

22
Q

What measurement is frequency measured in?

A

MHz

23
Q

What measurement is bandwidth measured in?

A

Mb or Gb / second; (Gbps)

24
Q

What is the max frequency for Cat 3?

A

16 MHz

25
Q

What is the max frequency for Cat 5e?

A

100MHz

26
Q

What is the max frequency for Cat 6?

A

250 MHz

27
Q

What is the max frequency for Cat 6a?

A

500 MHz

28
Q

What is the max bandwidth for Cat 3?

A

16 mbps

29
Q

What is the max bandwidth for Cat 5e?

A

1,000 mbps / 1 gbps

30
Q

What is the max bandwidth for Cat 6?

A

10,000 mbps / 10 gbps

31
Q

What is the max bandwidth for Cat 6a?

A

10,000 mbps / 10 gbps

32
Q

A MHz is how many hertz?

A

1,000,000 hertz

33
Q

What is frequency?

A

Bits of data per second; 1 hertz is 1 bit of data per second

34
Q

What is bandwidth?

A

Maximum amount of data that goes through the cable per second

35
Q

What are bandwidth-efficient encoding schemes?

A

Squeezing more bits into the same signal if the cable is capable of handling it; Is why Cat 5e can handle 1,000 mbps while being rated for 100 mHz

36
Q

What Cat of cabling is mainly used for modern networks?

A

Cat 6

37
Q

What Cat(s) of cabling are organizations future-proofing with?

A

Cat 6a & Cat7

38
Q

What connectors were used for old landline telephones?

A

RJ (Registered Jack)

39
Q

What connector is used by phones and supports up to 2 pairs of UTP wires?

A

RJ-11

40
Q

What are 8P8C connectors also called?

A

RJ45

41
Q

What are RJ45 connectors also called?

A

8P8C (8 point, 8 contact)

42
Q

What are the 4 components of fiber-optic cabling?

A

1) Core (glass fiber)
2) Cladding (reflects the light down)
3) Buffer/Fiber (buffer which adds strength)
4) Insulating Jacket

43
Q

What type of fiber optic experiences modal distortion?

A

MMF (LED-based)

44
Q

What is the first fiber optic connector called?

A

ST (twist)

45
Q

What is the second fiber optic connector called?

A

SC (click)

46
Q

What is the third fiber optic connector called?

A

LC (little couple meaning duplex)

47
Q

What is the fourth fiber optic connector called?

A

MT-RJ (duplex)

48
Q

Who sets the standards for networking?

A

IEEE

49
Q

What is the (###)(?) Working Group also called?

A

IEEE 802

50
Q

What is the IEEE (###)(?) also called?

A

802 Working Group

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