Lesson 2 Flashcards
What is the data conduit for the network
Network Media
Network Media
conduit for the network
Types of media
bound and unbound
Bound Media
copper
fiber
Uses a physical conductor Metal Glass Plastic
Unbound Media
RF
Wireless
Microwave
IR
Bounded Media conductor types
solid or braided
Shielding
braided wire or foil
Used to insulate from interference
Twisted Pair
UTP
STP
UTP
no shielding
contains four pairs
stranded or solid
inexpensive and reliable
STP
foil shielding to resist interference
Four Pairs
Stranded or solid core
More expensive
Twisted pair can come in what pairings
2 pair 4 Pair 6 Pair 25 Pair 100 Pair
Color of primary twisted pair wires
white and XXX
Color of secondary twisted pair wires
solid color
What is the standard range of twisted pair
100m
T568A
1 white green 2 green 3 white orange 4 blue 5 blue white 6 orange 7 white brown 8 brown
T568B
1 white orange 2 green 3 white green 4 blue 5 blue white 6 green 7 white brown 8 brown
Can UTP cables be connected together
with a UTP coupler
What does RJ stand for
Registered Jack
Name parts of coax cable
shielding
insulator
conductor
Name RG cable types
RG 59 RG 6 RG 8 RG 58 RG 9
What does RG stand for
Radio Guide
Name the different types of Coax connectors
F
BNC
Name some other copper cable types
Serial cable Fire wire USB Broadband over power line HDMI
Topic B
Topic B
Name the parts of fiber
buffer
coating
cladding
core
what produces the light in fiber
led
laser
what are the types of fiber
single mode at 9 microns
multimode at 50 microns
What causes refraction
change in velocity which is caused by a change in density
angle of incidence
angle of reflection
Fiber connectors are
ST SC LC MTRJ FC FDDI Biconic SMA
What are the types of ferrule polish
PC -40 db
UPC -55db
APC -70db
distance for twisted pair
100m
distance for coax
500m
distance for fiber
500m for single mode
ultra quality can see 62 miles
Topic C
Topic C
What are the network media performance factors
Noise
Attenuation
Impedance
Signal to noise ratio decreases or increases with the transmitting distance
decreases
Attenuation increase when cable length is exceeded
True
What is impedance
electrical resistance
Media converter
changes signal to accommodate different types of media
Types of media converters
multimode to Ethernet
fiber to coax
single mode to multi mode
single mode to Ethernet
Demarcation point
f
Backbone wiring
f
Equipment room
f
Telecomm Closet
f
Horizontal Wiring
f
Work Area
f
Premise Wiring
collection of cables connector and other devices for LAN and phone equipment. Consists of vertical and horizontal cable runs
Premise wire components
Drop cable Patch panel Patch cable Cross connects Distribution Frames Wiring closet
Which type of cable to use on unlike devices
straight through cable
Which type of cable to use on like devices
cross over cable
Which type of cable to use to connect to a router console port
roll over cable
Types of punch down blocks
66 block
110 block
66 block
low bandwidth transmissions
110 block
used for structured wiring
high bandwidth
Plenum
Tightly jacketed network cable to prevent fire from spreading down cable.
Does not emanate poisonous gases when it burns
When should you use Plenum
In HVAC systems
Structured and suspended ceilings
Under raised floors
In firebreak walls
Can non plenum cables run through a fire break
no
Is PVC plenum
no it is not plenum
what helps you manage cables
Cable management
What is used to support cables through cabling routes
Cable trays
Cable ladders
Cable Baskets
What is used to connect circuits to a network
Patch panels
All cable labeling is managed through
Move/Add/Change or MAC
Cable labeling
Should be typed not handwritten
Attached to the port
Attached to the cable system, circuit or patch panel
Label should be placed within 12” of each end of the cable.
FSAN
Pg 88
A UPS provides what for the network
Backup power
Power Conditioning
Real time monitoring and controlled shut down
Other things to consider regarding power management
Power converters
Circuits
Inverters
Power redundancy
What should be considered with Device placement
Proximity to power
Ease of access
Other devices
What is the standard rack mount format
19 inches
Name the two types of racks
Two post lightweight for switches
Four post heavy weight for servers
Guidelines for Installing Bounded Network Media
Pg 91
What can cause network interference
Radio
TV
Cell Phones
Radar
Interference reduces the network reliability and performance
True
Electrical Noise
Unwanted electrical signal present in the network media
Name some sources of electrical noise
Power wires
Meatal based transmission media
Electric motors
Electrical heat generating devices
Fluorescent lights
How do you protect sensitive devices from electrical noise
power conditioning
surge protectors
What directs high voltages away from humans and equipment
Grounding
What helps prevent noise on network media conductors
Grounding
Shielding
What is the connection between ground and shield called
Drain
Why are shields drained in only one location
To prevent a grounding loop
Grounding loop
When a grounding shield introduces noise in the data signal
Cross talk
when data wires introduce interference into one another
How to alleviate cross talk
Introducing numerous twists at regular intervals into the twisted pairs. The more twists the better.
Tightness of the twists in twisted pair is called the
Twist ratio
Can you untwist Cat 5 Cat 3 and Cat 6
Cat 5 only 3/8 of an inch
Cat 3 doesn’t matter
Cat 6 connector will not allow it to be untwisted
Noise reduction consideration
Separate data and electrical cables
Fluorescent lights
Power grounding
Connector installation
Use of other media like fiber
What are the twisted pair connectors
RJ-45 or RJ-11 (less used is RJ-48)
What separates the conductor and shield in coax
Dialectric insulator
Types of coax cables
multiple strand or solid core
What does cladding do
reflect light back into the fiber
Does cladding increase the distance the signal can travel without regeneration
Yes
Angle of refraction
angle the light changes when it leaves one medium and enters the second medium
Drop Cable
Wire that runs to a PC, printer or other device connected to a network
Patch panel
connection point for drop and patch cables
Patch cable
cable that is plugged into the patch panel to connect two drop cables
Most patch cable stranded or solid core
solid core
Cross connects
wires that connect two drop cables to a patch panel
Cross connects are rarely used on modern networks
Types of cross connects
Main cross connects
Intermediate cross connects
Horizontal cross connects
Vertical cross connects
Distribution frames
devices that terminate cables and enable connections
Wiring closet
network closet where patch panel are installed
Cable to connect unlike devices
straight through cable
Cable used to like devices
cross over cable
Cable used to connect to the router’s console port
roll over cable
Used to connect telephone lines to network lines
punch down block
Punch down blocks typically support which types of networks
low bandwidth networks and token ring networks
Which punch down block is used to support higher bandwidth than 66 blocks
110 punch down block
Free Standing Racks
heavier duty racks that don’t need to be bolted to the floor for stability
Competed
Completed
