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5. Networks > Chapter 3: Cabling and Topology > Flashcards

Chapter 3: Cabling and Topology Flashcards

1
Q

What is a network topology?

A

The way that cables and other pieces of hardware connect to one another.

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2
Q

Describe a bus topology

A
  • Wired

- Uses a single cable that connects all of the computers in a line

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3
Q

Describe a ring topology

A
  • Wired

- Connects all computers on the network with a ring of cable.

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4
Q

Describe a star topology.

A
  • Wired

- Uses a central connection box for all the computers on a network

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5
Q

Describe a hybrid topology.

A
  • Wired
  • Any form of networking technology that combines a physical topology with a signaling topology.
  • Star-bus is the most popular.
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6
Q

Describe a mesh topology.

A
  • Wireless

- Every computer connects to every other computer via two or more routes.

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7
Q

Describe a point-to-multipoint topology.

A
  • Wireless

- A single system acts as a common source through which all members of the network converse

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8
Q

Describe a point-to-point topology.

A
  • Wired or Wireless

- Two computers connecting directly

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9
Q

Which topology requires termination?

A

Bus

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10
Q

Star-bus is an example of a _______ topology.

A

hybrid

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11
Q

Which of the following is a duplex fiber-optic connection?

A) LC
B) RJ-45
C) ST
D) SC

A

A) LC

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12
Q

What is the most common category of UTP used in new cabling installations?

A

CAT 5e

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13
Q

In which two topologies does the entire network stop working if the cable breaks at any point?

A

Bus and ring

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14
Q

Which wired topology offers fault tolerance?

A

Star topologies offer fault tolerance, so if one of the cables breaks, all the other computers can still communicate.

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15
Q

What does logical topology refer to?

A

How signals travel electronically.

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16
Q

In a partially meshed topology…

A

At least two machines have redundant connections

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17
Q

In a fully meshed topology…

A

Every computer connects directly to every other computer.

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18
Q

What is a network technology?

A

A practical application of a topology and other critical technologies that provides a method to get data from one computer to another on a network.

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19
Q

What is EMI?

A

Electromagnetic Interference can affect data traveling across wires

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20
Q

What are the bayonet-style connectors called?

A

BNC connectors

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21
Q

What is the connector on coaxial cable called?

A

F-connector

22
Q

What do we use to name coax cables?

A

Radio Grade (RG) ratings

23
Q

What is the only important measurement of coax cabling?

A

It’s ohm rating, a relative measure of the resistance on the cable.

24
Q

What is the most common coax cable used today?

A

RG-6

25
Q

What does a barrel connector do?

A

Connects two coax cables

26
Q

What is the purpose of the twists in cabling?

A

They reduce crosstalk. The more twists, the less crosstalk.

27
Q

What is STP?

A

Shielded Twisted Pair cabling consists of twisted pairs of wires surounded by shielding to protect them from EMI.

28
Q

What are CAT cables rated in?

A

Megahertz (MHz), indicating the highest frequency the cable can handle.

29
Q

What is bandwidth?

A

The amount of data that can be transferred per second.

30
Q

What is the max frequency and max bandwidth of

CAT 3?

A

16 MHz

16 Mbps

31
Q

What is the max frequency and max bandwidth of

CAT 5?

A

100 MHz

100 Mbps

32
Q

What is the max frequency and max bandwidth of

CAT 5e?

A

100 MHz

1000 Mbps

33
Q

What is the max frequency and max bandwidth of

CAT 6?

A

250 MHz

10000 Mbps

34
Q

What is the max frequency and max bandwidth of

CAT 6a?

A

500 MHz

10000 Mbps

35
Q

What connectors do telephones use for twisted pair cabling?

A

RJ-11

36
Q

What connectors do networks use for twisted pair cabling?

A

RJ-45

37
Q

Describe Fiber-optic cable.

A

Fiber-optic cable transmits light rather than electricity, making it attractive for both high-EMI area and long-distance transmissions.

38
Q

What are the four components of fiber-optic cables?

A

1) Core: The glass fiber itself
2) Cladding: The part that makes the light reflect down the fiber
3) Buffer: Material to give it strength.
4) Insulating Jacket

39
Q

The designator to define fiber-optic cables is according to their ______ and ________ measurments.

A

Core, Cladding

40
Q

What is MMF?

A

Multimode Fiber is a fiber-optic cable that uses LEDs.

41
Q

What is SMF?

A

Single-mode fiber is a fiber-optic cable that uses lasers.

42
Q

What is modal distortion?

A

When signals sent at the same time don’t arrive at the same time because the paths differ in length slightly. This only happens with Multimode Fiber.

43
Q

Pneumonic for ST connector

A

“Straight Tip”

44
Q

Pneumonic for SC connector

A

“Square Connector”

45
Q

Pneumonic for LC connector

A

“Little Connector”

46
Q

What is an FC connector?

A

A fiber optic connector you screw in.

47
Q

What is the recommended standard upon which all serial communication takes place?

A

RS-232

48
Q

What is a DB-9 connector?

A
  • A 9-pin, male serial port
  • Bandwidth of 56,000 bps
  • Only works for point-to-point connections
49
Q

What is the Polyvinyl Chloride fire rating?

A
  • Has no significant fire protection

- If burned creates lots of smoke and noxious fumes

50
Q

What is the Plenum fire rating?

A
  • If burned creates much less smoke and fumes than PVC

- Costs about 3-5 times as much as PVC

51
Q

What is the Riser fire rating?

A

-Designates the proper cabling to use for vertical runs between floors of a building.

5. Networks (22 decks)

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