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Network + Exam N10-008 > Chapter 5: Installing a Physical Network > Flashcards

Chapter 5: Installing a Physical Network Flashcards

1
Q

What three essential things are needed to implement a basic structured cabling network?

A

A telecommunications room

Horizontal cabling

A work area

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2
Q

What is horizontal cabling?

A

Network cables that run more or less horizontally from the telecommunications room to the work areas.

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3
Q

What is a run?

A

A single piece of cable that runs from a work area to a telecommunications room.

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4
Q

What are the two types that UTP cables come in?

A

Solid core and stranded core.

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5
Q

What are the differences between UTP solid core and UTP stranded core cabling?

A

Solid core is a better conductor, but is stiff and will break from frequent/rough handling.

Stranded core is not quite as good of a conductor, but is better suited to frequent/substantial handling.

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6
Q

What type of horizontal UTP cabling does the TIA/EIA specify to be used?

A

Solid core UTP

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7
Q

What Cat ratings use four-pair UTP?

A

Cat 5e, Cat 6, Cat 6a, Cat 7, and up.

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8
Q

What is the common name for an Intermediate Distribution Frame (IDF) location?

A

A telecommunications room.

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9
Q

What is an equipment rack and how wide are they?

A

Equipment racks provide a safe and stable platform for different hardware components. They are all 19 inches wide, but vary in height.

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10
Q

What is an equipment rack unit (U)?

A

The height measurement for all rack-mounted equipment.

1U = 1.75 in
2U = 3.5 in
4U = 7 in

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11
Q

What is a four-post rack?

A

A rack that supports all four corners of the server.

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12
Q

What is a server rail rack?

A

A rack that enables you to slide the server out so you can open it up.

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13
Q

Define: Patch Panel

A

A box with a row of female ports in the front and permanent connections in the back, to which you connect the horizontal cables.

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14
Q

What is a 110 block?

A

A special punchdown connector that is commonly used in the back of patch panels. They require the use of a punchdown tool.

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15
Q

What is the official ANSI/TIA naming convention for patch panels?

A

ANSI/TIA-606-C

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16
Q

What are patch cables used for and what type of UTP cable are they?

A

Patch cables connect the ports of patch panels to switches and also NICs to wall drops. They are UTP stranded core cabling.

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17
Q

Define: Patch Bay

A

A dedicated block with A/V (audio/video) connections that runs of coaxial or fiber connect to.

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18
Q

What is the TIA/EIA 568 specification for UTP horizontal cabling length?

A

90 m, reserving 10 m for patch cables.

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19
Q

What is a demarcation point (demarc)?

A

The location where connections from the outside world come into a building. It marks the dividing line of responsibility for the functioning of the network.

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20
Q

Where will you find the demarc located?

A

In the service-related entry point for a network.

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21
Q

What is a Network Interface Unit (NIU)?

A

The equipment supplied by your ISP that serves as a demarc between your home network and your ISP.

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22
Q

What is a smartjack?

A

An NIU (Network Interface Unit) that is set up to do remote loopbacks to diagnose faults.

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23
Q

Define: Customer-Premises Equipment (CPE)

A

A powerful switch or other network box that the network and telephone cables connect to from the NIU (demarc).

This switch usually connects to a vertical cross-connect (main patch panel).

24
Q

Define: Demarc Extension

A

Any cabling that runs from the NIU (Network Interface Unit) to the CPE (Costumer-Premises Equipment).

25
Q

The main patch panel that leads to every telecommunications room in the building is called a ____.

A

vertical cross-connect

26
Q

What three important items does the Main Distribution Frame (MDF) room store?

A

The room that stores the NIU (Network Interface Unit), CPE (Customer Premises Equipment), and vertical cross-connect.

27
Q

Is a floor plan a key component of organizational documents?

A

Yes

28
Q

Define: Cable Drop

A

The location where the cable comes out of the wall in the work area.

29
Q

What are the five key issues in determining the location of the telecommunications room?

A

Distance
Power
Humidity
Cooling
Access

Also consider expandability/scalability

30
Q

What are the effects of signal degradation?

A

It slows or stops network communication.

31
Q

Define: Interference

A

Any disruption on a medium (wired or wireless) that intentionally or inadvertently prevents valid signals from being read by an intended recipient.

32
Q

What are challenges with UTP cabling?

A
  • Too long of cable
  • Too much noise
  • Broken wires
  • Wires not connected in the crimp (open)
  • A short created by two touching bare wires
  • Bent pins on the RJ-45 or in the jack
  • Incorrect pinout
  • Interference (EMI)
  • Split pair
33
Q

Define: Split Pair

A

Where the signal from any of the pairs in the same UTP cable interfere with another pair.

34
Q

What is a wire map test?

A

Testing to determine that all the wires on both ends of the cable connect to the right spot. It will also pick up shorts, crossed wires, and more.

35
Q

What tasks does a Time-Domain Reflectometer (TDR) testing tool do?

A

It checks continuity and wire maps. It also will locate breaks and determine cabling length.

36
Q

What is Near-End Crosstalk (NEXT)

A

Where the signal on one pair causes EMI on the other three pairs on the same end of the cable as the end emanating the signal.

37
Q

What is Far-End Crosstalk (FEXT)?

A

Where the signal on one pair causes EMI on the other three pairs on opposite end of the cable from the end emanating the signal.

38
Q

What is attenuation?

A

The weakening of a signal as it progresses down a piece of wire. As attenuation increases, the signal becomes more susceptible to crosstalk.

39
Q

What unit is signal loss measured in?

A

Decibel (dB)

40
Q

Define: Latency

A

A delay between the time the sending machine sends a message and the time the receiving machine can start processes those frames.

41
Q

Define: Jitter

A

A delay in completing a transmission of all the frames in a message. This becomes a serious problem in real-time voice communication.

42
Q

What are some fiber challenges?

A
  • Dirty optical cables/dirty connector
  • A small connector mismatch
  • Dispersion/modal dispersion
  • Bend radius limitation
  • Light leakage
  • Transceiver mismatch
  • Wavelength mismatch
  • etc.
43
Q

Define: Light Leakage

A

Light leakage means that part of the signal goes out of the cable rather than arriving at the end.

44
Q

What tasks does an optical time-domain reflectometer (OTDR) tool do?

A

It determines continuity in fiber-optic cabling and tells you how far down the cable to look for a break.

45
Q

What does a fusion splicer tool do?

A

It enables techs to combine two fiber-optic cables without losing quality.

46
Q

What are the three big issues with fiber-optic cabling?

A
  • Light leakage
  • Attenuation
  • Dispersion
47
Q

Define: Dispersion

A

When a signal spreads out over long distances.

Both attenuation and dispersion are caused when wave signals travel too far without help over fiber-optic media.

48
Q

What is port aggregation, bonding, or link aggregation?

A

Using multiple NICs for a single machine which effectively increases the overall bandwidth.

Most switches enable you to use multiple NICs for a single machine.

49
Q

What does Link Aggregation Control Protocol (LACP) do?

A

It controls how multiple network devices send and receive data as a single connection.

50
Q

What is another name for light-emitting diode (LED) status indicators?

A

Link lights

51
Q

What are couplers?

A

Small devices with two female ports that enable you to connect two pieces of cable together to overcome distance limitations.

52
Q

What do voltage event recorders do?

A

Plug into your power outlet and track the voltage over time.

53
Q

Define: Toner

A

The generic term for two separate devices that are used together: a tone generator and a tone probe.

54
Q

What is a tone generator?

A

A device that sends an electrical signal along a wire at a certain frequency.

55
Q

What is a tone probe?

A

A device that emits a sound when it is placed near a cable connected to the tone generator.

Network + Exam N10-008 (20 decks)

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