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CompTIA Network+ > Installing a Physical Network > Flashcards

Installing a Physical Network Flashcards

(58 cards)

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1
Q

structured cabling

A

standards developed by the TIA/EIA for the installation of network cables

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2
Q

components of structured cabling

A

telco room

horizontal cabling

work area

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3
Q

telco room

A

all cables from computers in the work area lead to this location

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4
Q

horizontal cabling

A

cables running horizontally from PCs to telco room

most of the cabling

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5
Q

run

A

a single piece of horizontal cabling

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6
Q

work area

A

office or cubicle that potentially contains a PC or phone

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7
Q

solid core cabling

A

single solid wire

better conductor

stiff & will break if handled too often or too roughly

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8
Q

stranded core cabling

A

several tiny wires bundled together

not as good of a conductor

more resistant to breaking

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9
Q

TIA/EIA specifies that horizontal cabling should always be [blank]

A

solid core

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10
Q

current standard for number of wires

A

4 pairs

CAT 5E & up are 4-pair-only cables

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11
Q

IDF

A

intermediate distribution frame

another name for telco room

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12
Q

width of all equipment racks

A

19 in

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13
Q

U

A

unit

1.75” height standard for rack-mountable equipment

1U, 2U, etc.

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14
Q

patch panel

A

box with a row of female ports in the front & permanent connections in the back

prevents continuous movement of solid core cables

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15
Q

110 block

A

110-punchdown block

special connector used by patch panels

wires connected using a punchdown tool

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16
Q

TX/RX reversed

A

inadvertent creation of cross-over cable by switching the sending / receiving wires

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17
Q

66-punchdown block

A

older technology used in about every commercial phone installation

produces more cross-talk

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18
Q

patch cable

A

short segment of straight-through UTP stranded core cable

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19
Q

[blank] also have CAT ratings

A

female RJ-45 wall jack outlets

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20
Q

TIA/EIA max allowed cable length

A

90 m

leaves 10 m for patch cable connection in work area

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21
Q

demarc

A

demarcation point

point at which exterior network connections enter the building

line between responsibility of ISP / phone provider & internal network

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22
Q

NIU

A

network interface unit

modem supplied by ISPs & phone providers for use in private home

serves as demarc

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23
Q

smart jacks

A

NIUs that have the ability to alert the provider when a disconnect occurs

may also set up a remote loop-back for remote testing

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24
Q

CPE

Study These Flashcards
A

customer premise equipment

box (owned by customer) into which all cables from the demarc enter

primary distribution tool for the building

25
multiplexer
special CPE used in phone systems
26
LAN CPE
usually a powerful switch connected to a patch panel patch panel typically leads to every telco in the building
27
vertical cross-connect
primary patch panel for a building
28
MDF
main distribution frame room that stores the demarc, phone cross-connects, & LAN cross-connects
29
planning physical cable install
blue print / floor plan critical map the runs
30
cable drop
location where the cable exits the wall in the work area single run of cable running from telco room to a wall outlet new run coming through a wall outlet that does not yet have a jack installed
31
determining location of telco room
distance - won't require runs over 90 m adequate power supply - dedicated circuit if possible avoid humid locations means of keeping room cool access - stop unauthorized - allow authorized scalability for growth
32
always [blank] patch panels
carefully label
33
crosstalk
signal sent down paired wire is picked up by other wires
34
NEXT
near-end crosstalk closer to end of cable from which signal emanates
35
FEXT
far-end crosstalk further from the end of the cable from which signal emanates
36
attenuation
weakening of a signal as it travels down a wire signal becomes more susceptible to crosstalk
37
signal loss / degradation in fiber connections
various imperfections in the glass media broken cables / open connections dirty connectors very small mismatches in clad or core
38
dispersion
spreading out of signal over long distances
39
modal distortion
dispersion caused by mismatch between propagation velocities between nodes when signals sent at the same time arrive at different times - different in wavelength of signals
40
bend radius limitation
limit to which a fiber cable may be bent without creaking light leakage
41
light leakage
signal leaving the cable
42
fiber mismatches
cable technology must match switch technology SMF connected to MMF different signal wavelengths (1310 vs 1550)
43
OTDR
optical time domain reflector tool used to measure continuity & determine break location
44
PCI
peripheral component interconnect older, still common type of expansion slot
45
PCIe
PCI express new type of expansion slot - more common 1 or 2 lane varieties
46
bonding (link aggregation)
ability to use multiple NICs for a single machine at least doubles the speed of connection by reducing the burden on a single NIC
47
LACP
link aggregation control protocol controls how multiple network devices send & receive data as a single connection
48
link lights
device is disconnected - always check link lights on NIC & switch first multispeed devices usually have link lights that indicate speed 1-4 lights per NIC switches - 1 light per port solid light indicates good connection (no blinking) many fiber NICs don't have link lights
49
activity light
indicates network traffic blinking in normal operation no activity - no connection (false connection link light)
50
collision light
indicates there has been a collision modern NICs don't have these
51
loopback test
sends data out of NIC & tests to see if it comes back true external loopback tests require loopback plug
52
why external loop back tests can be more accurate
some NICs only perform internal loopback tests - test internal circuitry - not connecting pins
53
UPS
uninterruptible power supply back up battery that plugs into the wall
54
online UPS
continually charges a battery - powers computer components - computer up until battery is drained
55
SPS
standby power supply charges battery - doesn't power computer unless power goes out
56
toner
general term for tone generator & tone probe
57
tone generator
connects to cable with alligator clips or network jack sends signal along wire at a certain frequency
58
tone probe
emits sounds when placed near a cable connected to the tone generator

CompTIA Network+ (9 decks)

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