A.電路交換B.報(bào)文交換C.虛電路方式D.數(shù)據(jù)報(bào)
A.1000Base-CX B.1000Base-LX C.1000Base-SX D.1000Base-T
A.電路交換 B.報(bào)文交換 C.分組交換 D.其他