Lesson 2: Physical Layer Cabling: Twisted Pair

Question 1

Alien Crosstalk (AXT)

Answer 1

Unwanted signal coupling from one permanent link to another

Question 2

Attenuation (Insertion Loss)

Answer 2

The amount of loss in the signal strength as it propagates down a wire or fiber strand

Question 3

Balanced Mode

Answer 3

Neither wire in the wire pairs connects to ground

Question 4

Bottlenecking

Answer 4

Another term for network congestion

Question 5

Building Entrance

Answer 5

The point where the external cabling and wireless services interconnect with the internal building cabling

Question 6

Campus Network

Answer 6

A collection of two or more interconnected LANs in a limited geographic area

Question 7

CAT6 (category 6)

Answer 7

Twisted-pair cables capable of carrying up to 1000Mbps (1 gigabit) of data up to a length of 100 meters

Question 8

CAT7/7a and CAT6a

Answer 8

UTP cable standards that support 10GB date rates for a length of 100 meters

Question 9

Color Map

Answer 9

The specification of which wire color connects to which pin on the connector

Question 10

Cross-connect

Answer 10

A space where you are going to take one or multiple cables and connect them to one or more cables or equipment

Question 11

Crossover Cable

Answer 11

Transmit and receive signal pairs are crossed to properly align the transmit signal on one device with the receive signal on the other device

Question 12

Crosstalk

Answer 12

Signal coupling in a cable

Question 13

EIA

Answer 13

Electronic Industries Alliance

Question 14

EIA/TIA 568-B

Answer 14

The standard that defines the six subsystems of a structured cabling system

Question 15

ELTCTL

Answer 15

Equal Level Transverse Conversion Transfer Loss

Question 16

EMI

Answer 16

Electromagnetic interference

Question 17

Entrance Facilities (EF)

Answer 17

A room set aside for complex electronic equipment

Question 18

Equipment Room (ER)

Answer 18

Cabling that interconnects telecommunication closets in the same building and between buildings

Question 19

F/UTP

Answer 19

Foil over twisted-pair cabling

Question 20

FastEthernet

Answer 20

An Ethernet system operating at 100Mbps

Question 21

Full Channel

Answer 21

Consists of all the link elements from the wall plate to the hub or switch

Question 22

Full Duplex

Answer 22

Computer system can transmit and receive at the same time

Question 23

Gigabit Ethernet

Answer 23

1000Mbps Ethernet

Question 24

Horizontal Cabling

Answer 24

Cabling that extends out from the telecommunications closet into the LAN work area

Question 25

Horizontal Cross-connect (HC)

Answer 25

The connection between the building distributors and the horizontal cabling to the work area or workstation outlet—another term used for the HC is the floor distributors (FD)

Question 26

Hybrid Echo Cancellation Circuit

Answer 26

Removes the transmitted signal from the receive signal

Question 27

IEEE 802.3an-2006 10GBASE-T

Answer 27

The standard for 10Gbps

Question 28

Intermediate Cross-connect (IC)

Answer 28

Also called the building distributor (BD), this is the building’s connection point to the campus backbone. The IC links the MC to the horizontal cross-connect (HC).

Question 29

LCL

Answer 29

Longitudinal Conversion Loss

Question 30

Link

Answer 30

Point from one cable termination to another

Question 31

Main Cross-connect (MC)

Answer 31

Usually connects two or more buildings and is typically the central telecommunications connection point for a campus or building. It is also called the main distribution frame (MDF) or main equipment room. The MC connects to Telco, an ISP, and so on. Another term for the MC is the campus distributor (CD).

Question 32

Multilevel Encoding

Answer 32

Technique used to reduce in the required bandwidth to transport the data

Question 33

Network Congestion

Answer 33

A slowdown on network data traffic movement

Question 34

Physical Layer

Answer 34

Provides the electrical and mechanical connection to the network

Question 35

PSAACRF

Answer 35

Power-Sum Alien Attenuation Cross-talk Ratio Far-End

Question 36

PSANEXT

Answer 36

Power-Sum Alien Near-End Crosstalk

Question 37

RX

Answer 37

Abbreviation for receive

Question 38

STP

Answer 38

Shielded twisted pair

Question 39

Straight-through Cable

Answer 39

The wire pairs in the cable connect to the same pin numbers on each end

Question 40

T568A

Answer 40

Wire color guidelines specified under the EIA/TIA568B standard

Question 41

T568B

Answer 41

Wire color guidelines specified under the EIA/TIA568B standard

Question 42

TCL

Answer 42

Transverse Conversion Loss

Question 43

TCO

Answer 43

Telecommunications outlet

Question 44

TCTL

Answer 44

Transverse Conversion Transfer Loss

Question 45

Telecommunications Closet

Answer 45

The location of the cabling termination points that includes the mechanical terminations and the distribution frames

Question 46

TIA

Answer 46

Telecommunications Industry Association

Question 47

TR

Answer 47

Another name for the telecommunications closet

Question 48

Wire-map

Answer 48

A graphical or text description of the wire connections from pin to pin

Question 49

Workstation or Work Area Outlet (WO)

Answer 49

Also called the TO (telecommunications outlet), it’s used to connect devices to the cable plant. The cable type typically used is CAT3, CAT5, CAT5e, CAT6, CAT6A, and various coaxial cables. Devices typically connected to these outlets are PCs, printers, servers, phones, televisions, and wireless access points.