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Network+ N10-007 > Cabling and Topology > Flashcards

Cabling and Topology Flashcards

1
Q

What is a topology?

A

Ways of connecting computers together

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2
Q

What is a network topology?

A

Way that cables and other pieces of hardware connect to one another

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3
Q

What are the 3 historical topologies?

A
  1. Bus
  2. Ring
  3. Star
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4
Q

What are the two modern topologies?

A
  1. Hybrid

2. Mesh

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5
Q

Describe a bus topology.

A

Network using a single cable to connect all computers in a line

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6
Q

Describe ring topology.

A

Network connected in a ring by a cable, where the date moves in a circle in the same direction

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7
Q

Why does the bus topology require termination at each end of the cable?

A

To prevent signal from reflecting at the ends

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8
Q

What do bus and ring topologies suffer from?

A

The entire network stops working if the cable breaks at any point

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9
Q

Describe a star topology.

A

Central connection box for all computers on a network

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10
Q

What does star topology offer that bus and ring do not?

A

Fault tolerance

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11
Q

Describe fault tolerance.

A

If one cable breaks, all the computers could still communicate

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12
Q

What is physical topology?

A

How the cables physically look

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13
Q

What is logical topology?

A

How the signals travel electronically

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14
Q

Describe mesh topology.

A

Network where every computer connects to every other computer via two or more routes

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15
Q

What are the two types of meshed topologies?

A
  1. Partially meshed

2. Fully meshed

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16
Q

Describe partially meshed topology.

A

At least two machines have redundant connections, but every machine does not have to connect to every other machine

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17
Q

Describe fully meshed topology.

A

Every computer connects directly to every other computer

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18
Q

What is network technology?

A

Practical application of a topology and other critical technologies that provide a method to get data from one computer to another on a network

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19
Q

What kind of cabling uses copper wire wrapped up in some kind of protective sheathing?

A

Copper cables

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20
Q

What are the two primary types of copper cabling used in the industry?

A
  1. Coaxial

2. Twisted pair

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21
Q

What is coaxial cable?

A

Contains a central conductor wire surrounded by an insulating material that is surrounded by a braided metal shield

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22
Q

What does coaxial cable do?

A

Fields data transmissions from interference(EMI)

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23
Q

What is an F-connector?

A

Type of cable connector that screws on, Making for a secure connection

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24
Q

What is an Ohm rating?

A

Relative measure of resistance on a cable

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25
What is impedance?
Set of characteristics that define how much a cable resists the flow of electricity
26
What is capacitance?
How long it takes the wire to get a full charge
27
What are the Ohm rating, connector type and use of RG-58 coaxial cables?
Ohm rating: 50 Connector: BNC Use: Networking
28
What are the Ohm rating, connector type and use of RG-59 coaxial cables?
Ohms: 75 Connector: F Type Use: Cable TV
29
What are the Ohm rating, connector type and use of RG-6 coaxial cables?
Ohms: 75 Connector: F Type Use: Cable TV
30
What are the two types of twisted-pair cabling?
1. Shielded | 2. Unshielded
31
Describe Shielded Twisted Pair(STP).
Consists of two pairs of wires surrounded by shielding to protect them from EMI
32
What are the 6 types of STP?
1. F/UTP 2. S/UTP 3. SF/UTP 4. S/FTP 5. F/FTP 6. U/FTP
33
Describe Unshielded Twisted Pair(UTP).
Consists of two pairs of wires surrounded by a plastic jacket; does not provide any protection from EMI
34
Describe F/UTP.
Foil shields the entire cable; inside, the wires are just like UTP
35
Describe S/UTP.
A braid screen shields the entire cable; inside, the wires are just like UTP
36
Describe SF/UTP.
A braid screen and foil shields the entire cable; the wires inside are just like UTP
37
Describe S/FTP.
A braid screen shields the entire cable; foil shields each wire pair inside
38
Describe F/FTP.
Foil screen shields the entire cable; flood shields each wire pair inside
39
Describe U/FTP.
No overall shielding; each pair inside is shielded with foil screens
40
What are Category (Cat) ratings?
Variety of grades of cable used by the cabling industry
41
What are Cat ratings officially rated in?
Megahertz (MHz)
42
What are the 4 Cat ratings recognized by the Telecommunications Industry Association(TIA)?
1. Cat 3 2. Cat 5e 3. Cat 6 4. Cat 6a
43
What are the max frequency and bandwidth of Cat 3 cables?
Frequency: 16 MHz Bandwidth: 16 Mbps
44
What are the max frequency and bandwidth of Cat 5e cables?
Frequency: 100 MHz Bandwidth: 1 Gbps
45
What are the max frequency and bandwidth of Cat 6 cables?
Frequency: 250 MHz Bandwidth: 10 Gbps
46
What are the max frequency and bandwidth of Cat 6a cables?
Frequency: 500 MHz Bandwidth: 10 Gbps
47
What is bandwidth?
Maximum amount of data that goes through a cable per second
48
What does 8P8C stand for?
8 position 8 contact; it is the current connector used on wires networks( sometimes referred to as RJ-45 connectors)
49
Describe fiber optic cables.
Transmit light rather that’s electricity, making it attractive for both high-EMI areas and long distance transmissions
50
What is the theoretical max distance that fiber optic cabling can operate at?
Distances up to tens of kilometers
51
What are the four components of fiber optic cables?
1. Core 2. Cladding 3. Buffer 4. Insulating jacket
52
What is cladding?
Part of fiber optic cable that makes the light reflect down the fiber
53
What is the most common fiber optic cable size?
62.5/ 125 micro
54
What is a multimode fiber(MMF)?
Fiber optic cable that uses LED’s
55
What is a single mode fiber (SMF)?
Fiber optic cable that uses lasers
56
Describe modal distortion.
Signals sent at the same time don’t arrive at the same time because the paths differ slightly in length
57
What does it mean when connectors are duplex?
Both the send and receive cables are attached
58
What are fire ratings?
Define the risk of network cables burning and creating noxious fumes and smoke
59
What are the two most common fire ratings?
1. PVC | 2. Plenum
60
What is PVC?
Polyvinyl chloride - rating has no significant fire protection; creates a lot of smoke and noxious fumes
61
Describe Plenum-rated cable.
Creates much less smoke and fumes than PVC but Costa about three to five times as much
62
What is a plenum?
Space between the acoustical tile ceiling and the actual concrete ceiling above
63
What is the third type of fire rating?
Riser - designated proper cabling to use for vertical runs between floors and a building
64
What is the IEEE?
Institute of Electrical and Electronics Engineers - defines the industry wide standards that promote the use and implementation of technology
65
What is the IEEE 802.1 subcommittee?
Higher layer LAN protocols
66
What is the 802.11 subcommittee?
Wireless LAN(WLAN); specifications such as Wi-Fi
67
What is the IEEE 802.15 subcommittee?
Wireless Personal Area Network (WPAN)
68
``` Which of the following topologies required termination? A. Star B. Bus C. Mesh D. Ring ```
B. Bus
69
Star-bus is an example of a ________ topology?
Hybrid
70
``` Of the topologies listed below, which is the most fault tolerant? A. Point-to-point B. Bus C. Star D. Ring ```
C. Star
71
What term is used to describe the inter connectivity of network components?
Topology
72
Coaxial cables all have an __________ rating.
Ohm
73
``` Which of the following is a type of coaxial cable? A. RJ-45 B. RG-59 C. BNC D. Barrel ```
B. RG-59
74
Which network topology connected nodes with a ring of cable?
Ring
75
Which network topology is most commonly seen in wireless networks?
Mesh
76
``` Which of the following is a duplex fiber-optic cable? A. LC B. RJ-45 C. ST D. SC ```
A. LC
77
What is the most common category of UTP used in new cabling installations?
Cat 5e

Network+ N10-007 (3 decks)

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