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Network+ > Lesson 2: Deploying Ethernet Cabling > Flashcards

Lesson 2: Deploying Ethernet Cabling Flashcards

1
Q

What type of signals does copper cable send?

A

Electrical signals

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2
Q

Fiber optic cable carries what type of signals?

A

Infrared light signals

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3
Q

What are the types of fiber cabling?

A

Single Mode (SMF), MultiMode (MMF), and MMF is categorized by Optical Mode designations (OM1-OM4)

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4
Q

What is the standard IEEE set for Ethernet?

A

802.3

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5
Q

Describe the naming conventions for 802.3 standards

A

xBASE-y
x: Bit rate
BASE: Baseband signal mode
-y: Media Type

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6
Q

What Ethernet protocol governs connection and media access?

A

Carrier Sense Multiple Access with Collison Detection (CSMA/CD)

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7
Q

What technology was implemented to support 10BASE-T and 100BASE-TX

A

Auto-negotiation

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8
Q

Define auto-negotiation

A

Mechanism that allows switching technology to sense the speed a cable/interface is capable of communicating at and match it to allow proper communication.

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9
Q

What is the maximum capable cable length for a Cat5e cable?

A

Up to 100m

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10
Q

What is the technical name for gigabit ethernet defined by IEE 802.3

A

1000BASE-T

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11
Q

What CAT cable standard is the minimum for gigabit (1 GB) ethernet?

A

Cat5e

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12
Q

What is the typical use case for 10GB and 40GB Ethernet?

A

In datacenters or high bandwidth networks.

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13
Q

What is the maximum capable cable distance of 10GB Ethernet?

A

55 - 100m

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14
Q

What is the maximum capable cable distance of 40GB Ethernet?

A

30m

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15
Q

What is required to properly implement long cable runs of 10GB and 40GB Ethernet?

A

Long cable runs of 10GB and 40GB Ethernet must use shielded/screened cables to prevent attenuation.

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16
Q

Define Unshielded Twisted Pair (UTP)

A

2 or 4 pairs of insulated wires twisted together to form a balanced pair of a negative and a positive wires.

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17
Q

Why are the cable pairs twisted in Unshielded Twisted Pair (UTP)

A

In a pair, each cable has its own polarity and twisted at different rates to reduce external interferance or crosstalk

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18
Q

What is the benefit of shielded Twisted Pair (STP)?

A

Less susceptible to interference and crosstalk.

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19
Q

List the types of shielded cables

A
  1. Screened/Foiled (F/UTP)
  2. Fully shielded/foiled (S/FTP)/(F/FTP)
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20
Q

Define Screened/Foiled Unshielded Twisted Pair (F/UTP) Cabling

A

Consists of two or four unshielded twisted pairs encased together in a foil shield.

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21
Q

Define Fully Shielded Screened/Foiled Twisted Pair (S/FTP) Cabling

A

Consists of two or four individually foil shielded twisted pairs encased in an overall braided shield; some contain a outer foil shield (F/FTP).

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22
Q

What is required to implement screened/shielded cabling?

A

Must also use screened/shielded connector, they can’t be mixed with unscreened/unshielded elements.

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23
Q

Define Cat5

A

Legacy installations only; for networks using hubs/bridges.

24
Q

Define Cat5e

A

Gigabit Ethernet (1GB) with distance up to 100m.

25
Q

Define Cat6

A

Gigabit Ethernet (1GB) up to 10GB, distance up to 55m.

26
Q

Define Cat6a

A

10BG distance up to 100m used, in health care facilities and for horizontal connections between network devices.

27
Q

Define Cat7

A

10GBE up to 100m not recognized by TIA.

28
Q

Define Cat8

A

40GB Intended for use in data center or high bandwidth devices.

29
Q

What 3 elements is a fiber optic cable made of?

A
  1. Core
  2. Cladding
  3. Buffer
30
Q

Describe the core of a fiber optic cable

A

Acts as a waveguide by providing transmission path for light signals

31
Q

Describe Cladding in a fiber optic cable

A

Cladding is a thing layer surrounding the core that reflects light signals back into the waveguide (core).

32
Q

Describe the Buffer in a fiber optic cable

A

A protective plastic coating

33
Q

What two modes make up fiber optic cabling?

A

Single Mode Fiber (SMF) and Multimode Fiber (MMF)

34
Q

How big is the core of a single mode fiber (SMF) cable?

A

Small core of 8 to 10 microns.

35
Q

What is the wavelength of a of a single mode fiber (SMF) cable?

A

Wavelength of 1310 nm or 1550 nm.

36
Q

How is the signal generated a single mode fiber (SMF) cable?

A

Infrared light signal generated by a laser.

37
Q

What is the maximum cable bandwidth/data rate for a single mode fiber (SMF) cable?

A

Up to 100Gbps

38
Q

List and define the two grades of Single Mode Fiber cabling

A
  1. OS1 - Indoor use
  2. OS2- Outdoor use
39
Q

How large is the core of a multi mode fiber (MMF) cable?

A

Larger core of 50 or 62.5 microns.

40
Q

What is the wavelength of a multi mode fiber (MMF) cable?

A

Short wavelength light of 850 nm or 1300 nm.

41
Q

List and define the four grades of Multimode Mode Fiber

A
  1. OM1 and OM2, use LED transmitters and are rated up to 1 Gbps
  2. OM3 and OM4
41
Q

What scenario is single mode fiber (SMF) cabling best suited for?

A

Long distance runs between sites that require high data rates.

42
Q

What scenario is multi mode fiber (MMF) cabling best suited for?

A

Suitable for LANs that don’t require long distances or high data rates.

43
Q

List the types of fiber optic connectors

A
  1. Straight Tip (ST)
  2. Subscriber Connector (SC)
  3. Local Connector (LC)
  4. Mechanical Transfer Registered Jack (MTRJ)
44
Q

Define a Straight Tip (ST) connector

A

Bayonet-style push/twist connector used mostly in multimode networks

45
Q

Define a Subscriber Connector (SC)

A

Push/pull design used in single or multimode networks, commonly used for gigabit ethernet

46
Q

Define a Local Connector (LC)

A

Small form factor connector version of SC, used for 1Gbps and up to 40Gbps

47
Q

Define a Mechanical Transfer Registered Jack (MTRJ)

A

Duplex connector designed for multimode network

48
Q

Define a Fiber Transceiver

A

Used to covert communication between Ethernet and Fiber optic, placed in a switch port and the fiber cable is connected to the transceiver

49
Q

List the two types of transceivers

A
  1. SFP(+)
  2. QSFP(+)
50
Q

Define a SFP/SFP+ fiber transceiver

A

SFP uses LC connectors and is designed for gigabit ethernet while SFP+ supports up to 10Gbps

51
Q

Define a QSFP/QSFP+ fiber transceiver

A

QSFP supports up to 4 1Gbps links that are combined to a single 4Gbps channel, while QSFP+ supports 4 10Gbps links that combine to make a single 40Gbps channel

52
Q

What technology does fiber cabling use to allow “full-duplex”?

A

Wavelength Division Multiplexing (WDM)

53
Q

Define Wavelength Division Multiplexing (WDM)

A

Means of using a single fiber cable to transmit and receive more than one channel/wavelength at a time

54
Q

Define Bidirectional Wavelength Division Multiplexing

A

The transmitter sends data using one wavelength, while the receiver receives data using another wavelength. This allows for bidirectional communication over a single fiber.

55
Q

Define Coarse Wavelength Division Multiplexing

A

Used to deploy four or eight bidirectional channels over a single stand of fiber

Network+ (19 decks)

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