Ism673 - Networking Chapter 2

Front 1

Physical Layer

Back 1

Describes the media that interconnects networking devices

Front 2

EIA

Back 2

Electronic Industries Alliance

Front 3

TIA

Back 3

Telecommunications Industry Association

Front 4

Campus Network

Back 4

Interconnected LANs within a limited geographic area

Front 5

EIA/TIA 568-B

Back 5

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

Front 6

Building Entrance

Back 6

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

Front 7

Entrance Facilities (EF)

Back 7

A room set aside for complex electronic equipment

Front 8

Equipment Room (ER)/Backbone Cabling

Back 8

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

Front 9

Telecommunications Closet

Back 9

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

Front 10

Telecommunications Room (TR)

Back 10

Another name for the Telecommunications Closet

Front 11

Horizontal Cabling

Back 11

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

Front 12

TCO

Back 12

Telecommunications Outlet

Front 13

Work Area

Back 13

The location of the computers and printers, patch cables, jacks, computer adapter cables, and fiber jumpers

Front 14

Main Cross-connect (MC)

Back 14

Usually connects two or more building 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)

Front 15

Intermediate Cross-connect (IC)

Back 15

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).

Front 16

Cross-connect

Back 16

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

Front 17

Horizontal Cross-connect (HC)

Back 17

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).

Front 18

Workstation or Work Area Outlet (WO)

Back 18

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.

Front 19

Terminated

Back 19

Define later

Front 20

Patch Cable

Back 20

a cable used to make the physical connection from the computer to the wall plate.

Front 21

UTP - Unshielded Twisted-pair

Back 21

a cable that plays an important role in computer networking

Front 22

Balanced Mode

Back 22

Neither wire in the wire pairs connects to ground and the balance of the two wire pairs helps maintain the required level of performance in terms of crosstalk and noise rejection

Front 23

FastEthernet

Back 23

An Ethernet system operating at 100Mbps

Front 24

Network Congestion

Back 24

A slowdown on network data traffic movement

Front 25

Full Duplex

Back 25

Computer system that can transmit and receive at the same time

Front 26

Gigabit Ethernet

Back 26

An Ethernet system operating at 1000Mbps

Front 27

CAT7/7a and CAT6a

Back 27

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

Front 28

10GBASE-T

Back 28

10GBDB over twisted-pair copper

Front 29

STP

Back 29

Shielded twisted-pair

Front 30

EMI

Back 30

Electromagnetic Interference

Front 31

T568A

Back 31

Wire color guidelines specified under the EIA/TIA568A standard

Front 32

T568

Back 32

Wire color guidelines specified under the EIA/TIA568B standard

Front 33

Color Map

Back 33

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

Front 34

TX

Back 34

Abbreviation for transmit

Front 35

RX

Back 35

Abbreviation for receive

Front 36

Straight-through Cable

Back 36

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

A B

1 -------------- 1

2 -------------- 2

3 -------------- 3

4 -------------- 4

5 -------------- 5

6 -------------- 6

7 -------------- 7

8 -------------- 8

Front 37

Crossover Cable

Back 37

Transmit and receiver wire pairs are crossed

Front 38

Link

Back 38

Point from one cable termination to another

Front 39

Full Channel

Back 39

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

Front 40

Attenuation (Insertion Loss)

Back 40

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

Front 41

Near-end Crosstalk (NEXT)

Back 41

A measure of the level of crosstalk or signal coupling within the cable, with a high NEXT (dB) value being desirable

Front 42

Crosstalk

Back 42

Signal coupling in a cable or in other words it is what you occasionally hear on the telephone when you can faintly hear another conversation

Front 43

Power Sum NEXT (PSNEXT)

Back 43

Power Sum Testing measures the total crosstalk of all cable pairs. This test ensures that the cable can carry data traffic on all four pairs at the same time with minimal interference. A HIGHER PSNEXT value is the best.

Front 44

Equal Level FEXT (ELFEXT)

Back 44

This measurement is for the far end of the cable and it does not depend on the length of the cable. This measurement is obtained by subtracting the attenuation value from the far-end crosstoalk (FEXT) loss. A larger ELFEXT value is the best.