網絡模型介紹

原創 Star永恒 2020-06-16 12:39

物理層主要作用是定義物理設備如何傳輸數據

數據鏈路層在通信的實體間建立數據鏈路連接

網絡層爲數據在結點之間傳輸創建邏輯鏈路

傳輸層

向用戶提供可靠的端到端（End-to-End）服務

傳輸層向高層屏蔽了下層數據通信的細節

應用層

爲應用軟件提供了很多服務

構建與TCP協議之上

屏蔽網絡傳輸相關細節

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