Bounded Network Media Flashcards by David H

contains the telecommunication service entrance to the building, campus-wide backbone connections, and the interconnection to the local exchange carrier’s telecommunication facilities. Where external network (ISP) meets internal network.

Demarcation Point (demarc)

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Information is sent one bit at a time in a specific sequence. This cable most often uses an RS-232 (aslo referred to as DB-9) connector, but can also use a DB-25 connector. In networking, these cables are often used to connect to routers for management of the router.

Serial Cable

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type of cable in which one or more pairs of copper wires are twisted around each other and clad in a color-coded, protective insulating plastic sheath or jacket to form a pair.

Twisted Pair Cables

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Does not include shielding around its conductors. Typically contains four pairs of stranded or solid conductors. Is inexpensive and reliable.

Unshielded Twisted Pair (UTP)

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Includes foil wrapper shielding around its conductors to improve the cable’s resistance to interference and noise. Typically contains four pairs of stranded or solid conductors. Is more expensive than UTP.

Shielded Twisted Pair (STP)

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Speed and Distance of Cat3

10 Mbps - 100 meters

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Speed and Distance of Cat4

16 Mbps - 100 meters

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Speed and Distance of Cat5

100 Mbps - 100 meters

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Speed and Distance of Cat5e

1 Gbps - 100 meters

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Speed and Distance of Cat6

1 Gbps - 100 meters - may be found where higher immunity to EMI/RFI noise is
10 Gbps - 55 meters

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Speed and Distance of Cat6a

10 Gbps - 100 meters

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Speed and Distance of Cat7

10 Gbps - 100 meters

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T568A Wiring Scheme

Pin 1 - White/Green			
Pin 2 - Green				
Pin 3 -  White/Orange		
Pin 4 - Blue				
Pin 5 - White/Blue			
Pin 6 - Orange			
Pin 7 - White/Brown			
Pin 8 - Brown

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T568B Wiring Scheme

Pin 1 - White/Orange			
Pin 2 - Orange				
Pin 3 -  White/Green		
Pin 4 - Blue				
Pin 5 - White/Blue			
Pin 6 - Green			
Pin 7 - White/Brown			
Pin 8 - Brown

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coaxial used for low-power video connections such as digital receivers.

RG59

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Better version of RG59 coaxial (both used for cable tv/cable modems.

RG6

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Coaxial cable used in Networks

RG58

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coaxial cable used in networks. Used for thin-net Ethernet networking.

RG8

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Coax connector used to connect cable TV and FM antennas (RG6 & RG59 Cables)

(F) Connector

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Usually used with RG58/U cables. Thin-net. (Two types- T-connectors and Barrel connectors)

BNC Connectors

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is a network cable composed of one or more bundled glass threads (fibers or filaments) that are coated in plastic and are used to transmit data by pulses of light. Each fiber is roughly the thickness of a human hair. Least sensitive of any cable type to electromagnetic interference.

Fiber Optic Cable

this is bad and happens when the medium isn’t terminated at the end or have a resistor.

Reflection

Better in every way than multimode, but more expensive. Uses Laser Pulses. At only 9 microns, the core fiber is much smaller in diameter than multimode fiber. Has a higher transmission rate and up to 50 times more potential distance than multimode fiber.

Single Mode Fiber

it’s core of 50 or 62.5 microns works with LED sources. Used mostly for short distances (up to 500 m). (Two types- Step-index and Graded index. Graded more efficient than step).

Multimode Fiber

They have a straight, ceramic center pin and bayonet lug lockdown. Often used in network patch panels. Among the most popular fiber cable connectors.

Straight Tip (ST)

They are often used in a duplex configuration where two fibers are terminated into two connectors that are molded together. Also called Subscriber Connector.

Standard Connector (SC)

about half the size of an SC or ST connector. this connector uses an RJ-45-type latching and can be used to transition installations from twisted pair copper cabling to fiber.

Local Connector (LC)

Two strands of fiber are attached

Mechanical Transfer Registered Jacket (MT-RJ)

used in industrial/heavy duty. SMA connector is water proof.

Ferrule Connector (FC)

is a transceiver used to convert electrical signals into optical signals and vice versa.

Gigabit Interface Converter (GBIC)

transceiver is most commonly used in 2 Gbps and 4 Gbps Fiber Channel components to interconvert electrical signals and optical signals. SFPs are similar to GBICs in their architecture, but they allow higher port density than GBICs

Small Form Factor Pluggable (SFP)

Supports 8 Gbps communication fiber channel, 10Gb Ethernet, and Optical Transport Network standard OTU2.

SFP+

Type of Ferrule Polish connector, the end faces are still curved but are angled at an industry-standard 8 degrees. Best one to use.

Angled Physical Contact (APC)

Second best Ferrule Polish connector to use.

Ultra Physical Contact (UPC)

Third best Ferrule connector to use. The end faces are polished to be slightly curved or spherical.

Physical Contact (PC)

standard specifies the bandwidth for fiber optic transmissions. Each channel is approximately 52 Mbps.

Optical Carrier x (OCx)

OC1 Data Rate

approx 52 Mbps

OC3 Data Rate

approx 156 Mbps. (52x3=156 Mbps)

OC192 Data Rate

approx 9.95 Gbps (52x192 = 9984 Mbps)

Splits Network Signals

Passive Optical Network (PON)

disrupts the signal. The signal-to-noise ratio decreases as the transmitting distance increases.

Noise- Electromagnetic Interference (EMI)

the progressive degradation of a signal as it travels across a network medium.

Attenuation

opposition to the flow of electricity in an alternating current (AC) circuit. To reduce the risk of signal loss and degradation through reflection, it is important that the transmitting device, the cabling, and any terminators have the same _____. Measured in ohms

Impedance

enables networks running on different media to interconnect and exchange signals. Example would be converting Fiber to Ethernet.

Media Converter

cable used to connect unlike devices, such as computers to hubs or switches. Pins are the same placement on both ends.

Straight Through Cables or Patch Cables

cable used to connect like devices, such as device to device, switch to switch, router to router, computer to computer.

Crossover cables

cable connects a device to a router’s console port. One end of the cable is wired exactly the opposite of the other end of the cable, going from 1 to 8 on one end and 8 to 1 on the other. Some have Ethernet connectors on both ends and will need a DB-9 (RS-232) or RJ-45 adapter to connect to a serial port.

Rollover Cable

can be used to connect one group of telephone and network wires with another group in utility or telecommunication closets.

Punch Down Block

A connection point for drop cables and patch cables. Typically has one or more rows of RJ-45 or other connectors.

Patch Panel

A termination point that allows for termination, storage, and splicing of fiber optic cable fibers.

Fiber Distribution Panel

a network cable that is jacketed tightly around conductors so that fire cannot travel within the cable. The jacket does not emanate poisonous gases when it burns. Also the name of the air handling space, including ducts and other parts of the HVAC system in a building.

Plenum cable / Plenum space

jacketed cabling is inexpensive and flexible. When it burns, it gives off noxious or poisonous gases. Tests show that fire can travel within this cable, passing through firebreaks.

Polyvinyl Chloride (PVC)