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CompTIA Network+ > Media and Cabling Distribution > Flashcards

Media and Cabling Distribution Flashcards

1
Q

types of media

A

copper, fiber optic, wireless

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2
Q

coaxial cable

A

insulated copper core, braided metal shielding

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3
Q

RG-6

A

coaxial cable used by local cable companies to connect homes

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4
Q

RG-59

A

coaxial cable used to carry video between devices like cable box to tv

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5
Q

f-connector

A

coaxial cable connector used for cable tv and cable modems

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6
Q

bnc

A

old coaxial cable connector

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7
Q

twinaxial cable

A

like coax but uses 2 inner conductors

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8
Q

serial cable

A

series of straight copper wires inside plastic jacket

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9
Q

DB-9 or DB-25

A

9-pin or 25-pin serial cable for async connection to external modem

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10
Q

twisted pair cables

A

most popular physical media for lan
UTP/STP
8 individual insulated copper wires
tighter twists = less EMI

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11
Q

utp

A

unshielded twisted pair

cheaper, most common

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12
Q

stp

A

shielded twisted pair
costs more
more shielding = less EMI
used in factories with lots of lights or EMI

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13
Q

RJ-45

A

8-pin ethernet twisted pair connector

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14
Q

RJ-11

A

6-pin twisted pair connector

telephone systems

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15
Q

RJ

A

registered jack

used to carry voice or data

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16
Q

bandwidth

A

theoretical measure of how much data could be transferred from src to dest

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17
Q

throughput

A

actual measure of how much data is transferred from src to dest

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18
Q

cat3

A

10base-t
10Mbps
100m

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19
Q

cat5

A

100base-tx
100Mbps
100m

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20
Q

cat5e

A

1000base-t
1000Mbps
100m

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21
Q

cat6

A

1000base-t 1000Mbps 1000m

10Gbase-t 10Gbps 55m

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22
Q

cat6a

A

10Gbase-t
10Gbps
100m

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23
Q

cat7

A

10Gbase-t
10Gbps
100m

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24
Q

cat8

A

40Gbase-t
40Gbps
30m

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25
Q

cable runs

A

keep under 70m from idf to office

26
Q

straight-through patch cables

A

contains the same pinout on both ends

connect laptop/desktop/server/router to switch/modem/hub/bridges

27
Q

crossover patch cables

A

contains different pinouts on each end
t-568b t-568a
switch switch
laptop laptop

28
Q

t-568b

A 
orange/white
orange
green/white
blue
blue/white
green
brown/white
brown
29
Q

t-568a

A 
green/white
green
orange/white
blue
blue/white
orange
brown/white
brown
30
Q

mdix

A

medium dependent interface crossover

automated way to electronically simulate crossover cable if using straight-through

31
Q

plenum cable

A

special coating to make cable fire-retardant
mimeses dangerous fumes
ceilings walls and raised floors

32
Q

non-plenum cable

A

pvc cables, default

dont use in raised floors ceilings or walls (places you cannot see them)

33
Q

fiber optic cables

A

use light from led or laser to transmit information through glass
immune to EMI, longer range, more data capacity Tbps
mmf, smf

34
Q

smf

A

single mode fiber
longer distances
smaller core size 8.3-10 microns

35
Q

mmf

A 
multimode fiber
shorter distances
larger core for multiple modes of travel
50-100 microns in diameter
<2kms
36
Q

sc

A

fiber subscriber connector

uses apc

37
Q

st

A

fiber straight tip connector

38
Q

lc

A

fiber local/lucent connector

39
Q

mtrj

A

fiber mechanical transfer registered jack

uses upc

40
Q

apc

A

angled physical contact

used with subscriber connector

41
Q

upc

A

ultra physical contact

42
Q

wdm

A

wavelength division multiplexing

combines multiple signals into 1 to send over single fiber using different wavelengths of light

43
Q

cwdm

A 
coarse wavelength division multiplexing
up to 18 channels
20nm channel distance
10Gbps ethernet
16Gbps fiber
44
Q

dwmd

A

dense wavelength division multiplexing
up to 80 channels
0.8nm channel distance
8Tbps = 100Gbps/channel

45
Q

fiber optic advantages

A 
higher bandwidth
longer distances
immune to EMI
better security
40+ Km
69+ Tbps
46
Q

copper advantages

A

less expensive
easy to install
< 100m
10Gbps

47
Q

media converters / transceivers

A

convert media from one format to another
layer 1 device
ethernet to fiber

48
Q

bidirectional transceiver/ half duplex

A

devices take turns communicating

either transmit or receive, not both at the same time

49
Q

full duplex

A

devices can both communicate at the same time

50
Q

gbic

A

Standard, gigabit Ethernet transceiver

copper or fiber

51
Q

sfp

A

small form-factor pluggable
Compact, optical module transceiver
4.2 Gbps

52
Q

sfp+

A

Enhanced small form-factor pluggable

16 Gbps

53
Q

qsfp

A

quad small form-facto pluggable transceiver

40Gbps

54
Q

qsfp+

A

enhanced quad small form-facto pluggable transceiver

41.2 Gbps

55
Q

demarcation point

A

point where wan connection from isp enters your building

56
Q

Cable Distribution

A

An organized system to connect

  • the network’s backbone in the main distribution frame to the
  • intermediate distribution frames and finally to the
  • end user’s wall jacks
57
Q

66 block

A

old punchdown block
Used for phones and older LAN wiring
Causes crosstalk due to proximity of cables

58
Q

110 block

A

punchdown block used for higher-speed network wiring cat5+

59
Q

Krone block

A

A proprietary European alternative to a 110 block

60
Q

BIX block

A

Another proprietary punch down block that comes in various sizes

61
Q

Patch Panels (Copper)

A

Device with jacks to connect wiring from the jack to a network switch in a
flexible manner
has punch downs on the back
has rj-45 on front

62
Q

Patch Panels (Fiber)

A

Connect fiber jacks throughout building to a single patch panel in
network closet
Front uses patch cables to connect different wall jacks and switch ports

CompTIA Network+ (22 decks)

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