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OSI七層的傳輸層資料連結層疑問

Dec 23rd 2014, 06:54

Data Link Layer 及Transport Layer兩個層級不相同
一種是在處理電流的通訊協定如PPPoE<--第二層
一種是在處理封包的協定(TCP/UDP)<--第四層
兩個層級不同
舉例來說...........
您家的電腦都會用來上網...
透過HTTP通訊協定來連網頁!
但HTTP是第七層....他的第三.四層的TCP/IP的通訊協定,
而您要透過ADSL上網...ADSL....與中華電信連結的通訊協定就是
PPPoE(第二層 Data Link Layer )
所以兩者是不衡突只是處理的目標是不同而己

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