Udemy Net+ 10-009 > Network Cabling > Flashcards

Network Cabling Flashcards

(70 cards)

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1
Q

802.3 standards

A

Defines protocols for wired LAN, aka Ethernet

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2
Q

Copper runs _____?
Fiber runs ______?
(Gbps)

A

40 Gbps
100 Gbps

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3
Q

Copper reaches ______?
Fiber reaches _______?
(Distance)

A

1100 meters (3609 ft)
40 km (25 miles)

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4
Q

Half-duplex is _______ communication.
Full-duplex is ______ communication.

A

One-way
Two-way

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5
Q

What ethernet cables support speeds from 100 Mbps to 10 Gbps

A

Cat 5, 5e, 6, 6a

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6
Q

What speeds do fiber optic cables offer ?

A

Up to 100 Gbps

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7
Q

What three key factors affect cable speeds ?

A

Quality, installation, and environmental interference

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8
Q

EMI

A

Signals from a device or cable leak out and disrupt signals of another device or cable

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9
Q

Are copper cable susceptible to interference ?

A

Highly

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10
Q

Are fiber cables susceptible to EMI ?

A

No

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11
Q

What does higher frequency equal to?

A

Higher frequency = faster tranmission speeds

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12
Q

Attenuation

A

Longer the cable, the weaker the signal

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13
Q

Is fiber affected by attenuation?

A

No

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14
Q

Coaxial cable

A

Electrical cable consisting of a central conductor, insulating layer, metallic shield, and plastic jacket

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15
Q

What is a coaxial cable used for ?

A

Transmitting television, satellite, and broadband internet

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16
Q

Which environments is coaxial commonly installed in?

A

Residential and commercial

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17
Q

What is the most popular coaxial cable ?

A

RG-6

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18
Q

What are the pros of coaxial cable ?

A

Affordable, shielding, and long transmission

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19
Q

What are the cons of coaxial cable ?

A

It is expensive and can snap

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20
Q

BNC connector

A

Secure locking connector

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21
Q

F connector (most popular)

A

Twisting hand screw commonly found on cable modems

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22
Q

Fiber-optic (glass or plastic)

A

Uses light to transmit data

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23
Q

What infrastructure is fiber optic ideal for ?

A

In telecommunications and internet backbone infrastructure

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24
Q

Fiber cable components

A

Outer jacket,strengthening layer, coating, cladding, and fiber strand

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25
Single-mode (WAN)
Single strand of glass fiber with a small diameter that allows only one mode of light to propagate
26
What is single mode designed for ?
Long-distance communication with minimal attenuation and dispersion
27
Where is single mode commonly used ?
Telecommunications and cable TV networks
28
Multimode fiber cable
Uses larger diameter fibers that allow multiple modes of light to propagate simultaneously
29
What environments is MMF typically used in?
Within buildings or in campus networks
30
What is the distance for data and telecommunications applications ?
Data = 500 meters Telecommunications = 2 km
31
What makes MMF the popular choice for LAN and short-range applications ?
More affordable and easier to work with
32
Pros of fiber optics ?
Not susceptible to EMI, longest transmission distance, fastest speeds
33
Cons of fiber optics ?
Difficult to install, most expensive, difficult to troubleshooting issues, need special tools, and hard to fix in the field
34
Which installations are ST connectors used in? (straight tip)
Used in SMF installations
35
SC connector (subscriber, square, standard)
-Snaps-in style -SMF and MMF installations
36
Characteristics of the LC connector (local, little, lucent)
-Snaps-in style -SFP -SMF and MMF installations
37
Characteristics of a dual LC connector ?
-Snaps-in style -SMF and MMF installations
38
Multi-fiber push on (MPO) characteristics
-Snaps-in style -SFP, SMF and MMF -Mostly used in MMF
39
Direct attached cable (DAC)
Alternative for close-range connectivity between network devices
40
What do DAC cables offer ?
Cost-effective and low-power
41
Twinaxial cables are used where and with what speeds?
In data centers for copper 10 Gigabit or 40 Gigabit ethernet standards
42
Advantages of twinaxial
Shielding and more affordable than fiber
43
Disadvantages of twinaxial ?
Costlier than coaxial and twisted pair, very short connections (0.5-7 meters)
44
Twisted pair
Eight wires twisted into 4 pairs
45
What is the most used networking cable in homes and offices ?
Twisted pair
46
Advantages of twisted pair ?
Easiest to install and manage, STP shielded, least expensive
47
Disadvantages of twisted pair ?
Limited transmission(100 meters), UTP no shielding
48
Two types of twisted pair ?
STP and UTP
49
RJ11 connector? What uses it?
4 pin connector, used in modems and analog telephones
50
RJ45 connector
8 pin connectors found on desktops, laptops, and servers
51
What are the twisted pair categories ?
Cat 5, 5e, 6, 6a, 7, 8
52
Which Cat cables can travel 100 meters distance ?
Cat 5, 5e, 6a, 7
53
Which short-range cat cable with very high speeds is used in data centers ?
Cat 8
54
At what distance and speeds can cat 6 run at ?
10 Gbps = 55 1 Gbps = 100 meters
55
Which cat cable has per pair shielding ?
Cat 7
56
How does cat 6 minimize crosstalk ?
Includes a piece of plastic to separate the 4 pairs of wire
57
How does cat 6a carry a more powerful signal for longer distance ?
Thicker wires
58
Two types of wiring standards
568A and 568B
59
Crossover cables
Cables created by terminating different standards at each end of the cable
60
How do you connect unlike devices ?
Straight through cable
61
Crossover cables connect similar devices?
True
62
Transceivers
Devices that can both transmit and receive data
63
How are transceivers used in networking to interface with cables of different types ?
Converting electrical signals to optical signals. Vice versa
64
SFP (small form-factor pluggable)
Optical module transceiver used for data and telecommunications
65
What speeds does SFP+ support ? How about the older version ?
10 Gbps and 4.25 Gbps
66
QSFP (quad small form-factor pluggable)
Transceiver used for fiber optic or electrical copper connections
67
What speeds does QSFP and QSFP+ support ?
28 Gbps and 40 Gbps
68
Media converters
Type of transceiver that converts data signals from one media type to another
69
Media converter examples ?
SMF to Ethernet, MMF to Ethernet, Fiber to Coaxical, SMF to MMF
70
What networks use BNC connectors?
Old bus and ring networks

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