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1
組員: 25羅翔云
30朱繡延
指導老師:王蘭華老師
通訊裝置
(纜線數據機、無線數據機、集線器、
網路卡、路由器、交換器)
2
纜線數據機
• 很多有線電視公司透過纜線數據機提
供高速的Internet連線。
• 和DSL一樣,纜線數據機服務並不
是每個地方都有。
• 它下載和上傳的速度經常比DSL
快。
• 他的線路是所有有線電視用戶共享
的,當使用人數增加時速度就會變
慢。
纜線數據機
3
無線數據機
• 他們傳送經過調制到載波頻率上的訊
息,這樣同時有很多無線通訊鏈路就可
以在相同或者不同的無線頻率工作。
• 現在使用無線寬頻連線方式的人數正急
遽增加當中。
• 使用Wi-Fi和相關技術,有無線寬
頻連線的校園中學生到處都可以連線。
• 在咖啡店、機場、圖書館等公共場所也
可以上網。 4
無線數據機
5
集線器
• 是指將多條乙太網路雙絞線或光纖集
合連接在同一段物理介質下的裝置。
• 集線器會把收到的任何數位訊號,經
過再生或放大,再從集線器的所有埠
送出。
• 訊號之間碰撞的機會很大,而且訊號
也可能被竊聽。
• 大部份集線器已被交換機取代。
6
7
集線器
網路卡
• 用來允許電腦在網路上進行通訊的電
腦硬體。
• 每一個網路卡都有一個獨一無二的48
位元序列號( MAC位址),它被寫
在卡上的一塊ROM中。
8
網路卡
9
路由器
• 是一種電腦網路裝置,它能將封包透
過一個個網路傳送至目的地。
• 就是連接兩個以上各別網路的裝置。
10
路由器
11
交換器
• 是一個擴大網路的器材,能為子網路
中提供更多的連接埠,以便連接更多
的電腦。
• 可用於劃分資料鏈路層廣播,即衝突
域;但它不能劃分網路層廣播,即廣
播域。
12
交換器
13

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