當(dāng)一臺(tái)計(jì)算機(jī)從FTP服務(wù)器下載文件時(shí),在該FTP服務(wù)器上對(duì)數(shù)據(jù)進(jìn)行封裝的五個(gè)轉(zhuǎn)換步驟是( )。
A:比特,數(shù)據(jù)幀,數(shù)據(jù)包,數(shù)據(jù)段,數(shù)據(jù)
B:數(shù)據(jù),數(shù)據(jù)段,數(shù)據(jù)包,數(shù)據(jù)幀,比特
C:數(shù)據(jù)包,數(shù)據(jù)段,數(shù)據(jù),比特,數(shù)據(jù)幀
D:數(shù)據(jù)段,數(shù)據(jù)包,數(shù)據(jù)幀,比特,數(shù)據(jù)