網路原理(一) Section 4.2

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Category 5 cable (Cat 5)
Category 5 (Cat5) cable is used commonly in 100BASE-TX Fast Ethernet installations.

Enhanced Category 5 cable (Cat5e)
5類雙絞線，一般稱為CAT-5線，是一種雙絞線，並設計為可提供高速度、低噪訊比的訊號傳輸線。

Category 6 cable (Cat6)
Category 6a cable (Cat6a)
Category 7 cable (Cat7)
各種線

Cladding & Jacket
Optical fiber is composed of two kinds of glass (core and cladding) and a protective outer shield (jacket).

Coaxial
同軸

Coaxial cabling
同軸電纜線

Core
芯

Coverage area
Wireless data communication technologies work well in open environments. However, certain construction materials used in buildings and structures, and the local terrain, will limit the effective coverage.

Crosstalk
Crosstalk is a disturbance caused by the electric or magnetic fields of a signal on one wire to the signal in an adjacent wire.

Dispersion
Dispersion refers to the spreading out of a light pulse over time.

Duplex Multimode LC Connector
Some fiber connectors accept both the transmitting and receiving fibers in a single connector known as a duplex connector, as shown in the Duplex Multimode LC Connector

Electromagnetic interference (EMI)
Radio frequency interference (RFI)
distort and corrupt the data signals being carried by copper media. 

End gap
The media does not completely touch at the splice or connection.

End finish
The media ends are not well polished, or dirt is present at the termination.

Enterprise networks
Used for backbone cabling applications and interconnecting infrastructure devices.

Long-hual networks
Used by service providers to connect countries and cities. 

Fiber-to-the-home (FTTH)
Used to provide always-on broadband services to homes and small businesses. 

Institute of Electrical and Electronics Engineers (IEEE)
電機電子工程師學會是一個建立於1963年1月1日的國際性電子技術與電子工程師協會，亦是世界上最大的專業技術組織之一，擁有來自175個國家的36萬會員。

Interference
Wireless is susceptible to interference and can be disrupted by such common devices as household cordless phones, some types of fluorescent lights, microwave ovens, and other wireless communications.

Lasers ; Light Emitting Diodes (LEDs)
Light pulses representing the transmitted data as bits on the media are generated by either

Misalignment
The fiber-optic media are not precisely aligned to one another when joined.

Multi-mode fiber (MMF)
Consists of a larger core and uses LED emitters to send light pulses.

Single-mode fiber (SMF)
Consists of a very small core and uses expensive laser technology to send a single ray of light.

Optical fiber cable
光纖電纜

RJ45 connector
8P8C，也稱RJ45，是乙太網使用雙絞線連接時常用的一種連結器插頭。

Rollover

A Cisco proprietary cable used to connect a workstation to a router or switch console port.

Shared medium
WLANs operate in half-duplex, which means only one device can send or receive at a time. 

Shielded twisted pair cabling (STP)
provides better noise protection than UTP cabling.

Signal attenuation
訊號衰減

ST,SC and LC fiber-optic connectors
An optical fiber connector terminates the end of an optical fiber.

Submarine networks
Used to provide reliable high-speed, high-capacity solutions capable of surviving in harsh undersea environments up to transoceanic distances. 

TIA 568A ; TIA 568B
The UTP cable type, related standards, and typical application of these cables. It also identifies the individual wire pairs for the TIA-568A and TIA-568B standards.

TIA/EIA 568 standard
The TIA/EIA-568 standard describes the wire color codes to pin assignments (pinouts) for Ethernet cables.  

Unshielded twisted pair (UTP)
Unshielded twisted-pair (UTP) cabling is the most common networking media.

 Wireless Access Point (AP)
無限存取點

Wireless NIC adapters
無線網卡適配器
Provide wireless communication capability to each network host.