OSI參考模型 物數(shù)網(wǎng)傳會(huì)表應(yīng) TCP/IP分層模型 應(yīng)用層：DNS, HTMI,HTTP...（應(yīng)用程序）會(huì)表應(yīng) 傳輸層：TCP舌涨，UDP, U...