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Network+2009
Network Media and Hardware
41
Computer Networking
Professional
03/04/2010

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Cards

Term
Bounded Media
Definition
Uses a PHYSICAL conductor. This conductor can be a wire in which electricity flows or a glass or plastic strands in which pulses of light flow
Term
Unbounded Media
Definition
Uses electromagnetic signals that are transmitted through the air
Term
Name some types of unbounded media
Definition
Infrared,Microwave,Radio
Term
Name some factors of media performance
Definition
Signal, noise, Attenuation, Impedance
Term
Signal
Definition
The electromagnetic communications you want to be transmitted across the network media
Term
Noise
Definition
Electromagnetic Interference(EMI) that disrupts the signal
Term
Attenuation
Definition
The degradation of a signal as it travels across a network medium, usually caused by the ACCUMULATION OF NOISE or fading signal strength
Term
Impedance
Definition
The force that opposes the flow of electricity in an AC current measured in Ohms
Term
Copper Cable
Definition
Used in bounded media consisting of  strands of copper wire or a single solid copper wire surrounded by a non-conductive insulated coat
Term
Shielding
Definition
Consists of foil or braided strands wrapped around a central conductor to prevent electromagnetic interference being intoduced into the network
Term
Name some types of copper mediums
Definition
Shielded twisted pair, Unshielded twisted pair, Coaxial
Term
STP
Definition
Shielded Twisted Pair: The more expensive of the copper medium, consisting of a shielding to prevent EMI(typically seen in Token Ring networking)
Term
UTP
Definition
Unshielded Twisted Pair: The most common of the copper mediums and more susceptible to EMI
Term
CAT-1
Definition
Voice grade not suitable for networking
Term
CAT-2
Definition
Used for digital telephone and low-speed networks. 4Mbps
Term
CAT-3
Definition
Ethernet:Used commonly for digital telephone. 10Mbps at 16Mhz
Term
CAT-4
Definition
IBM Token Ring. 16Mbps, can be used for 10Mbps networks
Term
CAT-5
Definition
Fast Ethernet. 100Mbps
Term
CAT-5e
Definition
Gigabit Ethernet. 350Mbps
Term
CAT-6
Definition
Gigabit Ethernet. 1Gbps at 250Mhz
Term
CAT-7
Definition
Gigabit Ethernet. 1Gbps+ at 1Ghz
Term
What is the maximum distance for all CAT cabling?
Definition
100 meters(328ft)
Term
Name the two EIA/TIA cabling schemes for CAT cabling
Definition
TIA/EIA 568A and TIA/EIA 568B
Term
What kind of wiring scheme does a crossover cable use?
Definition
TIA/EIA 568A at one end and TIA/EIA 568B at the other end
Term
Coaxial Cable
Definition
(Coax) is a type of copper cable that features a central, conducting copper core surrounded by an insulator and a braided shield wrapped in a outer jacket
Term
RG58/U
Definition
A .5mm(0.25inch) coax cable with a 50ohm impedance. Used in Ethernet networking(Solid Core)
Term
RG58A/U
Definition
5mm(0.25inch) coax cable with a STRANDED core and a 50 ohms impedance. Used in Ethernet networking
Term
RG8
Definition
10mm(0.5inch) coax cable with a SOLID core and 50 ohms impedance. Used in Ethernet neworking
Term
F-Type Connector
Definition
A screw-on or non-threaded slip-on connector used with a 75ohm cable to connect cable TV and FM antenna cables
Term
Termination
Definition
Is used to keep a signal from bouncing around on a cable
Term
Thinnet
Definition
Ethernet over RG58/U and RG58A/U configured in a bus configuration in which segments can be up to 185 meters(607ft)
Term
Thicknet
Definition
Ehternet over RG8 used as a network backbone 500meters(1640ft) in length uses vampire taps and 15 pin AUI connectors requiring 50ohms terminators and screw type N-connectors
Term
Vampire Taps
Definition
used in RG8 every 2.5 meters to pierce the outer jacket of the cable to touch the central conductor. Used for adding devices to the network
Term
15 AUI Connector
Definition
Term
Fiber Optic Cable
Definition
A network cable in which the core is one or more glass or plastic strands
Term
Whatis the range of diameter of a fiber optic cable
Definition
5-100 microns for the core and 125 micron for the outer diameter
Term
What are the fiber modes for optical cabling
Definition
Single Mode and Multi-Mode
Term
Single Mode(Properties)
Definition
Is smaller than multi-mode fiber, light only travels in one direction. Core is 9 microns thick. Uses a laser
Term
Multi-mode Fiber(Properties)
Definition
allows light to pass in multiple rays or mode through its core. Core is 50 or 62.5 microns thick. LED for slower LANs and lasers for Gigabit networks
Term
Single Mode Fiber
Definition
Term
What does STP mean?
Definition
Spanning Tree Protocol or Shielded Twisted Pair
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