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36 Cards in this Set

  • Front
  • Back

Two broad categories of cables

Copper Wire, Fibre Optic

Main difference between the two types of cables

Composition of signals, Speed of signals, Distance the signal can travel

•number of bits per second thatcan be transmitted across a medium

BandwidthRating

•maximum length of cable betweentwo network devicesD

MaximumSegment Length

Eachcable type can transport data only so far before its signals begin to weakenbeyond what can be read by a receiving device

attenuation

Afactor determining bandwidth is how bit signals are represented on the medium

encoding

Interferenceto electrical signals on copper media comes in the form of

–electromagneticinterference (EMI) andradiofrequency interference (RFI)

–is interference one wiregenerates on another wire when both wires are in a bundle

crosstalk

Criteria for Choosing Network Media

Cable Grade, Connection Hardware, Ease of Installation, Testability, Total Cost

Twisted pair cables come in two types:

Shielded and unshielded

•are necessary to improveresistance to crosstalk between the individual wires and EMI from outsidesources

Twists

•Consists of one or more pairs ofinsulated strands of copper wires twisted around one another and housed in anouter jacket

Twisted Pair Cable

Most Networks use

Unshielded Twisted Pair cable

Twisted Pair Cable Plant Components

RJ-45 Connectors,


Patch Cable,


RJ-45 Jacks,


Patch Panels,


Distribution Racks

–Most commonly used in patchcables, which are used to connect computers to hubs, switches, and RJ-45 walljacks

RJ-45 Connectors,

•short cable for connecting acomputer to an RJ-45 wall jack or connecting a patch-panel port to a switch or hub

Patchcable

•what you plug an RJ-45 connectorinto when the computer is not near a switch or hub

RJ-45jacks

usedto terminate long runs of cable from where the computers are to the wiringcloset

PatchPanels [

•hold network equipment such asrouters and switches, plus patch panels and rack-mounted servers

Distributionracks

•specifies how cabling should beorganized, regardless of the media type or network architecture

Structuredcabling

•whereworkstations and other user devices are located

Work Area

runs from the work area’s wall jack to the telecommunication closet and is usually terminated at a patch panel

Horizontalwiring

•house servers, routers, switches,and other major network equipment and serves as a connection point for backbonecabling

EquipmentRooms

–Runs between floors or wings of abuilding and between buildings; interconnects TCs and equipment rooms

BackboneCabling

•the location of the cabling andequipment that connects a corporate network to a third-party telecommunicationsprovider

EntranceFacility

•putting RJ-45 plugs on the endsof cable or punching down wires into terminal blocks on a jack or patch panel

Cabletermination

Two standards of arrangement of wires:

–568A and 568B

Standard patch cables are called

straight-through

– use 568A standard on one side of the cable and 568B standard on the other side

Crossovercables

___ devices transmit on pins 1 and 2and receive on pins 3 and 6

MDI

____ devicesreceive on pins 1 and 2 and transmit on pins 3 and 6

MDI-X

•Bits are transmitted as pulses oflight instead of electricity

Fibre-optic cable

Eachfiber-optic strand carries data in

onlyone direction

Fiber-opticcable used as backbone cabling often comes in bundles

Of 12 or more strands

–Include a single, small-diameterfiber at the core (8 microns)

Single-mode Fibre

–Uses a considerably largerdiameter fiber at the core (50 and 62.5 microns)

Multi-mode fiber