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PCH 11 Copper vs Fiber(銅vs光纖)
learning objectives/學習目標
Categorize characteristics of connectors and cabling.
分類連接器和電纜的特性。
When we compare the advantages and disadvantages of fiber-optic cables and copper (twisted pair) cables, we have to consider that fiber-optic has a higher bandwidth (measured in Gbps or Tbps), it can carry its signal many miles without the need of a repeater, it is immune to the effects of EMI, and it has much better security than traditional twisted pair cables. However, twisted pair cabling does hold some advantages of its own. For one, it is much less expensive than fiber-optic cabling. Also, copper wiring is much easier to install, taking only a few hours to learn. Finally, twisted pair cabling can be created and terminated using inexpensive tools. For example, a complete copper wiring toolset can be bought online for less than $50, while a complete fiber-optic kit may cost $1000 or more. For these reasons, copper has remained the dominant media in most local area networks.
當我們比較光纖電纜和銅纜（雙絞線）的優缺點時，我們必須考慮到光纖具有更高的帶寬（以Gbps或Tbps為單位），它可以將信號傳輸很多英里而無需作為中繼器，它不受電磁干擾的影響，並且比傳統的雙絞線電纜具有更好的安全性。但是，雙絞線電纜確實具有一些優點。首先，它比光纖電纜便宜得多。而且，銅線的安裝更容易，只需幾個小時即可完成。最後，可以使用廉價的工具創建和終止雙絞線電纜。例如，一套完整的銅線工具套件可以在線購買，價格不到50美元，而一套完整的光纖套件的價格可能在1000美元以上。由於這些原因，銅一直是大多數局域網中的主要介質。
PCH 11 Coaxial-Cable(同軸電纜) <<
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