你可能感興趣的試題

A.手機(jī)上行到短信網(wǎng)關(guān)的短信
B.短信網(wǎng)關(guān)下行到手機(jī)的短信
C.普通的點(diǎn)對(duì)點(diǎn)短信
D.以上皆非

A、數(shù)據(jù)段-數(shù)據(jù)包-數(shù)據(jù)幀-數(shù)據(jù)比特流-數(shù)據(jù)
B、數(shù)據(jù)比特流-數(shù)據(jù)幀-數(shù)據(jù)包-數(shù)據(jù)段-數(shù)據(jù)
C、數(shù)據(jù)-數(shù)據(jù)包-數(shù)據(jù)段-數(shù)據(jù)幀-數(shù)據(jù)比特流
D、數(shù)據(jù)比特流-數(shù)據(jù)段-數(shù)據(jù)包-數(shù)據(jù)幀-數(shù)據(jù)