OSI七層模型:物理層、數(shù)據(jù)鏈路層、網(wǎng)絡(luò)層、傳輸層、會(huì)話層、表示層、應(yīng)用層
數(shù)據(jù)鏈路層對(duì)應(yīng)的數(shù)據(jù)為Frame,網(wǎng)絡(luò)層對(duì)應(yīng)的數(shù)據(jù)為Packet,傳輸層對(duì)應(yīng)的數(shù)據(jù)為Segment。
網(wǎng)絡(luò)數(shù)據(jù)首先會(huì)打到TCP的Segment中,然后TCP的Segment會(huì)打到IP的Packet中,然后再打到以太網(wǎng)Ethernet的Frame中,傳到對(duì)端后,各個(gè)層解析自己的協(xié)議,然后把數(shù)據(jù)交給更高層的協(xié)議處理。

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