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CompTIA Network+ (mine) > 2. Cabling and Topology > Flashcards

2. Cabling and Topology Flashcards

1
Q

network topology

A

Describes how computers connect to each other in that network. The topologies on the test are star, bus, ring, and mesh.

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2
Q

bus topology

A

All computers connected to the network via a main line. The cable (bus) was terminated at each end to prevent signal reflections.

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3
Q

ring topology

A

All computers on the network attached to a ring of cable. A single break would stop the data for everyone.

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4
Q

star topolgy

A

All computers connect to a central wiring point, providing fault tolerance.

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5
Q

hybrid topologies

A

Star-bus and star-ring. Only star-bus is used today.

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6
Q

mesh topology

A

Each computer connects to every other via 2 or more routes. Used in wireless networks.

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7
Q

two forms of copper cabling

A

coaxial (coax) and twisted pair

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8
Q

coaxial cable

A

Shields against EMI. Was used widely in early bus networks with BNC connectors.

Mainly used to connect a cable modem to an ISP now.

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9
Q

coax ratings

A

RG-6 is the predominant coax today.

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10
Q

twisted pair types

A

Comes either shielded or unshielded and is the most common type of network cable.

UTP is less expensive and more popular.

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11
Q

UTP ratings

A 
Cat 5
Cat 5e
Cat 6
Cat 6a
are the most common, but 
Cat 3
Ca7
are also on the test.
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12
Q

UTP connector

A

RJ-45 (which is really a 8P8C)

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13
Q

2 types of fiber-optic cable

A

LED - MMF (multimode fiber)

Laser - SMF (single-mode fiber)

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14
Q

modal distortion

A

A situation that occurs in MMF where signals that are sent at the same time don’t arrive at the same time due to slight variations in the length of their paths.

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15
Q

4 fiber-optic cable parts

A

The core; the cladding, which covers the fiber and helps to reflect light down the fiber; buffer material to give strength; and the outer insulating jacket.

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16
Q

4 common fiber connectors

A

ST
SC
LC
MT-RJ

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17
Q

UTP fire ratings

A

A plenum-rated cable gives off less smoke and fumes than PVC but costs more. Plenum is often required by city ordinance.

A PVC-rated cable offers no significant fire protection.

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18
Q

serial cable

A

An old, retired cable used for point-to-point connections. The connector was a DB-9 and looked like a male VGA.

RS-232 protocol.

19
Q

parallel cable

A

An old, retired cable. The connector was a DB-25.

IEEE-1284 set the standards for parallel communication.

20
Q

IEEE 802

A

Committee that defines frames, speeds, distances, and types of cables used in networks. It split into subcommittees like 802.3 and 802.11

21
Q

8P8C

A

8 position 8 contact (commonly referred to as RJ-45)

22
Q

bandwidth

A

The amount of data that goes through a cable per second.

23
Q

buffer

A

Material found within the insulation of a fiber optic cable to give it strength.

24
Q

BNC connector

A

An early model of connector used on coax cables.

25
Q

category (Cat) rating

A

Measures the bandwidth of a cable.

26
Q

cladding

A

The covering over the actual fiber of a fiber-optic cable which reflects light down the line.

27
Q

core

A

The glass fiber in a fiber-optic cable.

28
Q

crosstalk

A

When a signal transmitted on one circuit interferes with the signal on another. (Increasing the twists per foot in UTP decreases crosstalk).

29
Q

EMI

A

electromagnetic interference

30
Q

F (F-type) connector

A

Replaced the BNC connector for coax. Screws into place.

31
Q

fault tolerance

A

A single fault in the network won’t bring the whole thing down.

32
Q

fiber-optic cable

A

Transmits data way further than copper, but is more expensive, less durable, and less flexible.

33
Q

fully meshed topology

A

Refers to a wireless network where each computer has a direct connection to every other computer.

34
Q

hybrid topology

A

Any form of networking that combines a physical topology (an actual layout) with a signaling topology (how the electrical current travels).

35
Q

insulating jacket

A

The outer layer of a fiber-optic cable.

36
Q

physical topology

A

The arrangement of devices on a computer network and how they communicate with one another.

37
Q

MMF

A

multimode fiber (used for LELDs)

38
Q

SMF

A

single-mode fiber (used for LASERs)

39
Q

network topology

A

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

40
Q

segment

A

in bus topology:

The new, smaller bus that was put inside a router.

41
Q

logical topology

A

Relating to how a signal travels electronically (ie, how the circuit works).

42
Q

Ohm rating

A

A measure of resistance in a cable

43
Q

partially meshed topology

A

In this topology, at least two machines have redundant connections.

CompTIA Network+ (mine) (2 decks)

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