Network+ Cabling Flashcards
single mode
8-10 micron diameter long distance cabling used for fiber optic networkinguses lasers to transmit light signals
multi-mode
50-62.5 micron diameter cable that allows multiple optical frequencies to travel in the core simultaneouslyuses LEDs to transmit light signals
ST connector
"straight tip"older bayonet connector that locks in place and has a straight tip at the end
LC connector
"local connector" "lucent connector"high density fiber designed by Lucent to be used in fiber optic networksvery similar to MTRJ, except has a lock to secure the connection in place
SC connector
"subscriber connector" "standard connector"square connector with a spring loaded coupling to improve performancerelatively large size that limits how many ports you can have on your devices
APC connector
These connectors feature a fiber end face that is polished at an 8-degree anglethe angled end face of the connector causes reflected light to reflect at an angle into the claddinggenerally greenbetter optical performance
UPC connector
These connectors are polished with no angle any reflected light is reflected straight back towards the light sourcegenerally blueless costly, simpler
MTRJ connector
"Mechanical Transfer-Registered Jack"created to replace both ST + SC connectors2 fiber-optic cables terminating into the connector: one for transmitting + one for receiving full-duplex
GBIC
a first generation supplementary interface adaptor that converts/allows 1Gbps conversion from fiber optic to twisted pair or vice versa
SFP+
small form factor interface that supports up to 16Gbps fiber optic data traffic
QSFP
A transceiver with a small enough form factor that it can plug into a network interface but allow conversion of electrical Ethernet to fiber optic at up to 28Gbps
RJ-45
used to terminate a Cat5 cable into an 8 pin connector8 positions + 8 conductors = 8 wires terminating into this connector
RG-6
coax commonly used in cable TV, satellite, and broadband internet installationthick conductor wire
RG-59
coax commonly used in cable TV, satellite, and broadband internet installationthin conductor wire
crossover cable
A type of Ethernet cable designed to connect two computers to each other. By contrast, most Ethernet cables are designed to connect one computer to a router or switch. A cable that is terminated to allow transmissions to smoothly terminate at the receiving side without an intermediary device.
console cable
cable termination suitable for use with direct network device management
TIA/EIA 568
cat 5 cable termination using split pair wiring at the ends
plenum-rated cabling
use of cabling with sheathing rated to be flame resistant
F-Type connector
A connector used to terminate coaxial cable used for transmitting television and broadband cable signals.**most common and likely what you have seen
BNC connector
A coaxial cable connector type that uses a twist-and-lock (or bayonet) style of coupling. It may be used with several coaxial cable types, including RG-6 and RG-59.
RJ-11
A phone line connection or port found on modems, telephones, and house phone outlets.has 6 positions and 2 conductors - 2 cables are terminating into this connectora.k.a. 6P2C connector
DB-9
9-pins - often used in serial port connections.
DB-25
25-pins - often used in serial port connections (also parallel connections)
66 block
A type of punch-down block designed to terminate telephone connections. older
110 block
wire-to-wire patch panelreplaces 66 block - accommodates Cat 5 + Cat 6 cables
copper patch panel
punch-down block on one side - RJ45 connector on the othermove a connection around to different switch interfacesthe run to the desk doesn't move
fiber distribution panel
permanent fiber installationpatch panel at both endssoft curves to accommodate bend radius of fiber cables
Cat 3
16 MHz16 Mbps100m
Cat 5
100 MHz100 Mbps100m**can run 1000BASE-T
Cat 5e
100 MHz1000 Mbps/1 Gbps100m
Cat 6
250 MHz10,000 Mbps/10 Gbps55m
Cat 6a
500 MHz10,000 Mbps/10 Gbps100m
Cat 7
600 MHz10,000 Mbps/10 Gbps100m
Split pairs
A connection in which two wires are incorrectly mapped in exactly the same way on both ends of the cable.Each pin on one end of the cable is correctly wired to the corresponding pin at the other end, but the wires inside the cable that are used to make connections are incorrect.
Open circuit
An incomplete electrical circuit in which no current flows.
Short circuit
When one pin on one end of the cable run is connected to two or more pins on the other end of the cable run.When the conductors of two or more wires are touching inside the cable run.
Transposed wires
When both of the wires in the pair are connected to the wrong pins at one end of the cable run.
Crosstalk
A type of interference caused by signals on one wire bleeding over to other wires.
Jitter
A connectivity problem on wired networks caused by individual packets that are delayed due to network congestion, different routing, or queuing problems.
Latency
Describes generalized delay in network transmissions.
Attenuation
The weakening of a signal as it travels through a network medium.
Bottleneck
A condition in which all traffic is delayed due to a faulty or inadequate component.
Wiremap tester
A tool that consists of a main unit that connects to all 8 wires of a UTP cable at once and a loopback device that connects to the other end, enabling you to test all wires at once.
TDR (Time-Domain Reflectometer)
A tool that transmits a signal over the cable and measures how long it takes for the reflection of the signal to return from the other end.
OTDR (Optical Time-Domain Reflectometer)
A tool that transmits light pulses over a fiber-optic network and measures the time interval and the strength of the returning pulse.
Multimeter
A tool that measures the electric current on a copper conductor.
Tone generator and locator
A device that locates cables in a wiring closet. The __________ is typically placed at the user end, and the _________ is waved around in the wiring closet to locate the connection. It will make a distinctive noise when it is near the correct cable.
Loopback connector
A tool that tests transmission and reception capabilities of a port.
Butt set
A one-piece telephone handset with alligator clips that enables its operator to connect to a line anywhere that the cables are accessible.
Punchdown tool
A tool that attaches keystone connectors to cable ends, for use in wall plates and patch panels.
Crimper
A plier-like device that cable installers use only to create patch cables by attaching RJ-45 connectors to lengths of bulk cables.To attach a bulk cable end to a RJ-45 connector, you use the tool to squeeze the connector closed, forcing the wire ends to contact the connector's pins.
Wire stripper
A tool used when terminating a cable. The tool cuts away the plastic jacket or coating around the wires in a cable so that a connector can be installed on the end of the cable.
Pigtail splice
A short length of wire that connects at one end to a screw terminal on an electrical device, with the other end joined to circuit wires that are connected together with a wire connector (wire nut).It is only used with fiber-optic networks.
OLTS (Optical Loss Test Set)
A tool that identifies signal loss in fiber-optic cabling.
Light meter
A tool that measures the strength of light signals in fiber-optic cabling.
Cable certifier
A very powerful cable testing device that identifies a variety of cable performance characteristics and then generates a certification report, proving that cable runs pass TIA/EIA standards.It provides the functionality of a wiremap tester and a tone generator.