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交換以太網(wǎng)在獲得確定性的同時(shí)，傳輸速度也有極大的提高。千兆以太網(wǎng)已普及，10Gb/s的交換以太網(wǎng)正在開發(fā)。當(dāng)以太網(wǎng)用于信息技術(shù)時(shí)，應(yīng)用層含有HTTP(文本傳輸協(xié)議)、FTP (文件傳輸協(xié)議)、SMTP(簡(jiǎn)單電子郵件傳送協(xié)議)和Telnet(遠(yuǎn)程登錄)。這些基于TCP/IP的協(xié)議簇已經(jīng)成為工業(yè)界事實(shí)上的網(wǎng)絡(luò)標(biāo)準(zhǔn)，在不同廠商的不同網(wǎng)絡(luò)系統(tǒng)互聯(lián)方面起著關(guān)鍵作用。但當(dāng)以太網(wǎng)用于工業(yè)控制時(shí)，體現(xiàn)在應(yīng)用層的是實(shí)時(shí)通信、用于系統(tǒng)組態(tài)的對(duì)象以及工程模型的應(yīng)用協(xié)議
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